// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package org.chromium.chrome.browser;

import static org.chromium.chrome.browser.ui.IncognitoRestoreAppLaunchDrawBlocker.IS_INCOGNITO_SELECTED;

import android.content.Intent;
import android.content.pm.ShortcutManager;
import android.content.res.Configuration;
import android.os.Build;
import android.os.Bundle;
import android.os.SystemClock;
import android.text.TextUtils;
import android.text.format.DateUtils;
import android.util.Pair;
import android.view.KeyEvent;
import android.view.KeyboardShortcutGroup;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.view.ViewStub;
import android.view.Window;
import android.view.WindowManager;

import androidx.annotation.IntDef;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
import androidx.annotation.VisibleForTesting;
import androidx.lifecycle.Lifecycle;
import androidx.lifecycle.LifecycleObserver;
import androidx.lifecycle.LifecycleRegistry;

import org.chromium.base.ApplicationStatus;
import org.chromium.base.BuildInfo;
import org.chromium.base.Callback;
import org.chromium.base.CallbackController;
import org.chromium.base.CommandLine;
import org.chromium.base.IntentUtils;
import org.chromium.base.Log;
import org.chromium.base.MemoryPressureListener;
import org.chromium.base.ThreadUtils;
import org.chromium.base.TraceEvent;
import org.chromium.base.library_loader.LibraryLoader;
import org.chromium.base.metrics.RecordHistogram;
import org.chromium.base.metrics.RecordUserAction;
import org.chromium.base.supplier.ObservableSupplierImpl;
import org.chromium.base.supplier.OneShotCallback;
import org.chromium.base.supplier.OneshotSupplier;
import org.chromium.base.supplier.OneshotSupplierImpl;
import org.chromium.base.supplier.Supplier;
import org.chromium.base.supplier.UnownedUserDataSupplier;
import org.chromium.base.task.PostTask;
import org.chromium.base.task.TaskTraits;
import org.chromium.build.annotations.UsedByReflection;
import org.chromium.cc.input.BrowserControlsState;
import org.chromium.chrome.R;
import org.chromium.chrome.browser.IntentHandler.IntentHandlerDelegate;
import org.chromium.chrome.browser.IntentHandler.TabOpenType;
import org.chromium.chrome.browser.accessibility_tab_switcher.OverviewListLayout;
import org.chromium.chrome.browser.app.ChromeActivity;
import org.chromium.chrome.browser.app.metrics.LaunchCauseMetrics;
import org.chromium.chrome.browser.app.metrics.TabbedActivityLaunchCauseMetrics;
import org.chromium.chrome.browser.app.tabmodel.AsyncTabParamsManagerSingleton;
import org.chromium.chrome.browser.app.tabmodel.ChromeNextTabPolicySupplier;
import org.chromium.chrome.browser.app.tabmodel.TabModelOrchestrator;
import org.chromium.chrome.browser.app.tabmodel.TabWindowManagerSingleton;
import org.chromium.chrome.browser.app.tabmodel.TabbedModeTabModelOrchestrator;
import org.chromium.chrome.browser.auxiliary_search.AuxiliarySearchController;
import org.chromium.chrome.browser.auxiliary_search.AuxiliarySearchControllerFactory;
import org.chromium.chrome.browser.back_press.BackPressManager;
import org.chromium.chrome.browser.back_press.MinimizeAppAndCloseTabBackPressHandler;
import org.chromium.chrome.browser.back_press.MinimizeAppAndCloseTabBackPressHandler.MinimizeAppAndCloseTabType;
import org.chromium.chrome.browser.bookmarks.BookmarkUtils;
import org.chromium.chrome.browser.browserservices.intents.WebappConstants;
import org.chromium.chrome.browser.compositor.CompositorViewHolder;
import org.chromium.chrome.browser.compositor.layouts.Layout;
import org.chromium.chrome.browser.compositor.layouts.LayoutManagerChrome;
import org.chromium.chrome.browser.compositor.layouts.LayoutManagerChromePhone;
import org.chromium.chrome.browser.compositor.layouts.LayoutManagerChromeTablet;
import org.chromium.chrome.browser.compositor.overlays.strip.StripLayoutHelperManager.TabModelStartupInfo;
import org.chromium.chrome.browser.cookies.CookiesFetcher;
import org.chromium.chrome.browser.crypto.CipherFactory;
import org.chromium.chrome.browser.dependency_injection.ChromeActivityComponent;
import org.chromium.chrome.browser.device.DeviceClassManager;
import org.chromium.chrome.browser.dom_distiller.ReaderModeManager;
import org.chromium.chrome.browser.download.DownloadNotificationService;
import org.chromium.chrome.browser.download.DownloadOpenSource;
import org.chromium.chrome.browser.download.DownloadUtils;
import org.chromium.chrome.browser.feature_engagement.TrackerFactory;
import org.chromium.chrome.browser.feature_guide.notifications.FeatureNotificationUtils;
import org.chromium.chrome.browser.feed.FeedSurfaceTracker;
import org.chromium.chrome.browser.firstrun.FirstRunSignInProcessor;
import org.chromium.chrome.browser.flags.ActivityType;
import org.chromium.chrome.browser.flags.ChromeFeatureList;
import org.chromium.chrome.browser.flags.ChromeSwitches;
import org.chromium.chrome.browser.fonts.FontPreloader;
import org.chromium.chrome.browser.gesturenav.NavigationSheet;
import org.chromium.chrome.browser.homepage.HomepageManager;
import org.chromium.chrome.browser.incognito.IncognitoNotificationManager;
import org.chromium.chrome.browser.incognito.IncognitoNotificationPresenceController;
import org.chromium.chrome.browser.incognito.IncognitoProfileDestroyer;
import org.chromium.chrome.browser.incognito.IncognitoStartup;
import org.chromium.chrome.browser.incognito.IncognitoTabLauncher;
import org.chromium.chrome.browser.incognito.IncognitoTabbedSnapshotController;
import org.chromium.chrome.browser.incognito.IncognitoUtils;
import org.chromium.chrome.browser.layouts.LayoutStateProvider;
import org.chromium.chrome.browser.layouts.LayoutType;
import org.chromium.chrome.browser.lifecycle.ActivityLifecycleDispatcher;
import org.chromium.chrome.browser.locale.LocaleManager;
import org.chromium.chrome.browser.metrics.AndroidSessionDurationsServiceState;
import org.chromium.chrome.browser.metrics.LaunchMetrics;
import org.chromium.chrome.browser.metrics.MainIntentBehaviorMetrics;
import org.chromium.chrome.browser.modaldialog.ChromeTabModalPresenter;
import org.chromium.chrome.browser.multiwindow.MultiInstanceChromeTabbedActivity;
import org.chromium.chrome.browser.multiwindow.MultiInstanceManager;
import org.chromium.chrome.browser.multiwindow.MultiWindowUtils;
import org.chromium.chrome.browser.native_page.NativePageAssassin;
import org.chromium.chrome.browser.navigation_predictor.NavigationPredictorBridge;
import org.chromium.chrome.browser.ntp.NewTabPageLaunchOrigin;
import org.chromium.chrome.browser.ntp.NewTabPageUma;
import org.chromium.chrome.browser.ntp.NewTabPageUtils;
import org.chromium.chrome.browser.omnibox.OmniboxFocusReason;
import org.chromium.chrome.browser.paint_preview.StartupPaintPreviewHelper;
import org.chromium.chrome.browser.paint_preview.StartupPaintPreviewHelperSupplier;
import org.chromium.chrome.browser.partnercustomizations.PartnerBrowserCustomizations;
import org.chromium.chrome.browser.preferences.ChromePreferenceKeys;
import org.chromium.chrome.browser.preferences.SharedPreferencesManager;
import org.chromium.chrome.browser.profiles.OTRProfileID;
import org.chromium.chrome.browser.profiles.Profile;
import org.chromium.chrome.browser.profiles.ProfileManager;
import org.chromium.chrome.browser.quick_delete.QuickDeleteController;
import org.chromium.chrome.browser.quick_delete.QuickDeleteDelegateImpl;
import org.chromium.chrome.browser.quick_delete.QuickDeleteMetricsDelegate;
import org.chromium.chrome.browser.read_later.ReadingListBackPressHandler;
import org.chromium.chrome.browser.read_later.ReadingListUtils;
import org.chromium.chrome.browser.reengagement.ReengagementNotificationController;
import org.chromium.chrome.browser.search_engines.SearchEngineChoiceNotification;
import org.chromium.chrome.browser.settings.SettingsLauncherImpl;
import org.chromium.chrome.browser.share.ShareHelper;
import org.chromium.chrome.browser.share.send_tab_to_self.SendTabToSelfAndroidBridge;
import org.chromium.chrome.browser.signin.services.IdentityServicesProvider;
import org.chromium.chrome.browser.suggestions.SuggestionsMetrics;
import org.chromium.chrome.browser.survey.ChromeSurveyController;
import org.chromium.chrome.browser.sync.SyncServiceFactory;
import org.chromium.chrome.browser.sync.ui.SyncErrorMessage;
import org.chromium.chrome.browser.tab.EmptyTabObserver;
import org.chromium.chrome.browser.tab.RedirectHandlerTabHelper;
import org.chromium.chrome.browser.tab.Tab;
import org.chromium.chrome.browser.tab.TabAssociatedApp;
import org.chromium.chrome.browser.tab.TabCreationState;
import org.chromium.chrome.browser.tab.TabDelegateFactory;
import org.chromium.chrome.browser.tab.TabLaunchType;
import org.chromium.chrome.browser.tab.TabObscuringHandler;
import org.chromium.chrome.browser.tab.TabSelectionType;
import org.chromium.chrome.browser.tab.state.CriticalPersistedTabData;
import org.chromium.chrome.browser.tab.tab_restore.HistoricalTabModelObserver;
import org.chromium.chrome.browser.tabbed_mode.TabbedAppMenuPropertiesDelegate;
import org.chromium.chrome.browser.tabbed_mode.TabbedRootUiCoordinator;
import org.chromium.chrome.browser.tabmodel.ChromeTabCreator;
import org.chromium.chrome.browser.tabmodel.IncognitoTabHost;
import org.chromium.chrome.browser.tabmodel.IncognitoTabHostRegistry;
import org.chromium.chrome.browser.tabmodel.IncognitoTabHostUtils;
import org.chromium.chrome.browser.tabmodel.NextTabPolicy.NextTabPolicySupplier;
import org.chromium.chrome.browser.tabmodel.TabModel;
import org.chromium.chrome.browser.tabmodel.TabModelSelector;
import org.chromium.chrome.browser.tabmodel.TabModelSelectorBase;
import org.chromium.chrome.browser.tabmodel.TabModelSelectorObserver;
import org.chromium.chrome.browser.tabmodel.TabModelSelectorTabModelObserver;
import org.chromium.chrome.browser.tabmodel.TabModelSelectorTabObserver;
import org.chromium.chrome.browser.tabmodel.TabModelUtils;
import org.chromium.chrome.browser.tabmodel.TabWindowManager;
import org.chromium.chrome.browser.tasks.EngagementTimeUtil;
import org.chromium.chrome.browser.tasks.HomeSurfaceTracker;
import org.chromium.chrome.browser.tasks.JourneyManager;
import org.chromium.chrome.browser.tasks.ReturnToChromeUtil;
import org.chromium.chrome.browser.tasks.ReturnToChromeUtil.ReturnToChromeBackPressHandler;
import org.chromium.chrome.browser.tasks.TasksUma;
import org.chromium.chrome.browser.tasks.tab_management.CloseAllTabsDialog;
import org.chromium.chrome.browser.tasks.tab_management.TabGroupUi;
import org.chromium.chrome.browser.tasks.tab_management.TabManagementDelegateProvider;
import org.chromium.chrome.browser.tasks.tab_management.TabSwitcher;
import org.chromium.chrome.browser.tasks.tab_management.TabUiFeatureUtilities;
import org.chromium.chrome.browser.toolbar.ToolbarButtonInProductHelpController;
import org.chromium.chrome.browser.toolbar.ToolbarIntentMetadata;
import org.chromium.chrome.browser.toolbar.ToolbarManager;
import org.chromium.chrome.browser.toolbar.top.ToolbarControlContainer;
import org.chromium.chrome.browser.ui.AppLaunchDrawBlocker;
import org.chromium.chrome.browser.ui.IncognitoRestoreAppLaunchDrawBlockerFactory;
import org.chromium.chrome.browser.ui.RootUiCoordinator;
import org.chromium.chrome.browser.ui.appmenu.AppMenuPropertiesDelegate;
import org.chromium.chrome.browser.ui.native_page.NativePage;
import org.chromium.chrome.browser.undo_tab_close_snackbar.UndoBarController;
import org.chromium.chrome.browser.usage_stats.UsageStatsService;
import org.chromium.chrome.browser.util.ChromeAccessibilityUtil;
import org.chromium.chrome.features.start_surface.StartSurface;
import org.chromium.chrome.features.start_surface.StartSurfaceConfiguration;
import org.chromium.chrome.features.start_surface.StartSurfaceDelegate;
import org.chromium.chrome.features.start_surface.StartSurfaceState;
import org.chromium.chrome.features.start_surface.StartSurfaceUserData;
import org.chromium.components.browser_ui.settings.SettingsLauncher;
import org.chromium.components.browser_ui.util.BrowserControlsVisibilityDelegate;
import org.chromium.components.browser_ui.util.ComposedBrowserControlsVisibilityDelegate;
import org.chromium.components.browser_ui.util.FirstDrawDetector;
import org.chromium.components.browser_ui.widget.gesture.BackPressHandler;
import org.chromium.components.embedder_support.util.UrlConstants;
import org.chromium.components.embedder_support.util.UrlUtilities;
import org.chromium.components.embedder_support.util.UrlUtilitiesJni;
import org.chromium.components.feature_engagement.EventConstants;
import org.chromium.components.feature_engagement.Tracker;
import org.chromium.components.messages.MessageDispatcherProvider;
import org.chromium.components.profile_metrics.BrowserProfileType;
import org.chromium.components.webapps.ShortcutSource;
import org.chromium.content_public.browser.LoadUrlParams;
import org.chromium.content_public.browser.NavigationHandle;
import org.chromium.content_public.browser.RenderFrameHost;
import org.chromium.content_public.browser.WebContents;
import org.chromium.content_public.common.ContentSwitches;
import org.chromium.ui.base.DeviceFormFactor;
import org.chromium.ui.base.PageTransition;
import org.chromium.ui.widget.Toast;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.List;
import java.util.Locale;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;

/**
 * This is the main activity for ChromeMobile when not running in document mode.  All the tabs
 * are accessible via a chrome specific tab switching UI.
 */
public class ChromeTabbedActivity extends ChromeActivity<ChromeActivityComponent>
        implements ChromeAccessibilityUtil.Observer {
    private static final String TAG = "ChromeTabbedActivity";

    protected static final String WINDOW_INDEX = "window_index";

    private static final int INVALID_WINDOW_ID = TabWindowManager.INVALID_WINDOW_INDEX;

    // How long to delay closing the current tab when our app is minimized.  Have to delay this
    // so that we don't show the contents of the next tab while minimizing.
    private static final long CLOSE_TAB_ON_MINIMIZE_DELAY_MS = 500;

    // Maximum delay for initial tab creation. This is for homepage and NTP, not previous tabs
    // restore. This is needed because we do not know when reading PartnerBrowserCustomizations
    // provider will be finished.
    private static final int INITIAL_TAB_CREATION_TIMEOUT_MS = 500;

    /**
     * Sending an intent with this action to Chrome will cause it to close all tabs
     * (iff the --enable-test-intents command line flag is set). If a URL is supplied in the
     * intent data, this will be loaded and unaffected by the close all action.
     */
    private static final String ACTION_CLOSE_TABS =
            "com.google.android.apps.chrome.ACTION_CLOSE_TABS";

    // Name of the ChromeTabbedActivity alias that handles MAIN intents.
    public static final String MAIN_LAUNCHER_ACTIVITY_NAME = "com.google.android.apps.chrome.Main";

    public static final SettingsLauncher SETTINGS_LAUNCHER = new SettingsLauncherImpl();

    public static final Set<String> TABBED_MODE_COMPONENT_NAMES = Set.of(
            ChromeTabbedActivity.class.getName(), MultiInstanceChromeTabbedActivity.class.getName(),
            ChromeTabbedActivity2.class.getName(), MAIN_LAUNCHER_ACTIVITY_NAME);

    /**
     * Identifies a histogram to use in {@link #maybeDispatchExplicitMainViewIntent(Intent, int)}.
     */
    @IntDef({DispatchedBy.ON_CREATE, DispatchedBy.ON_NEW_INTENT})
    @Retention(RetentionPolicy.SOURCE)
    private @interface DispatchedBy {
        int ON_CREATE = 1;
        int ON_NEW_INTENT = 2;
    }

    // Time histogram used to track time to inflate tab switcher views.
    private static final String TAB_SWITCHER_CREATION_TIME = "Android.TabSwitcher.CreationTime";

    private final MainIntentBehaviorMetrics mMainIntentMetrics;
    private @Nullable MultiInstanceManager mMultiInstanceManager;

    private UndoBarController mUndoBarPopupController;

    private LayoutManagerChrome mLayoutManager;

    private ViewGroup mContentContainer;

    private ToolbarControlContainer mControlContainer;

    private TabbedModeTabModelOrchestrator mTabModelOrchestrator;
    private TabModelSelectorBase mTabModelSelector;
    private TabModelSelectorObserver mTabModelSelectorObserver;
    private TabModelSelectorTabObserver mTabModelSelectorTabObserver;
    private TabModelSelectorTabModelObserver mTabModelObserver;
    private HistoricalTabModelObserver mHistoricalTabModelObserver;

    private BrowserControlsVisibilityDelegate mVrBrowserControlsVisibilityDelegate;

    private boolean mUIWithNativeInitialized;

    private Boolean mIsAccessibilityTabSwitcherEnabled;

    private LocaleManager mLocaleManager;

    private AppIndexingUtil mAppIndexingUtil;

    private Runnable mShowHistoryRunnable;

    private CompositorViewHolder mCompositorViewHolder;
    private OverviewListLayout mOverviewListLayout;
    /**
     * Keeps track of whether or not a specific tab was created based on the startup intent.
     */
    private boolean mCreatedTabOnStartup;

    // Whether or not the initial tab is being created.
    private boolean mPendingInitialTabCreation;

    // Whether {@link setInitialOverviewState()} has been called within the current onStart/onStop
    // session.
    private boolean mHasDeterminedOverviewStateForCurrentSession;
    /**
     *  Keeps track of the pref for the last time since this activity was stopped.
     */
    private ChromeInactivityTracker mInactivityTracker;
    /**
     *  The controller for the auxiliary search.
     */
    private @Nullable AuxiliarySearchController mAuxiliarySearchController;

    // This is the cached value of mIntentHandler#shouldIgnoreIntent and shouldn't be read directly.
    // Use #shouldIgnoreIntent instead.
    private Boolean mShouldIgnoreIntent;

    // Supplier for a dependency to inform about the type of intent used to launch Chrome.
    private OneshotSupplierImpl<ToolbarIntentMetadata> mIntentMetadataOneshotSupplier =
            new OneshotSupplierImpl<>();

    // Time at which an intent was received and handled.
    private long mIntentHandlingTimeMs;

    /**
     * Whether the StartSurface is shown when Chrome is launched.
     */
    private boolean mOverviewShownOnStart;
    // Whether the activity is staring from a resumption. False if the activity is starting from
    // onCreate(), a cold startup.
    private boolean mFromResumption;

    private NextTabPolicySupplier mNextTabPolicySupplier;

    private final UnownedUserDataSupplier<StartupPaintPreviewHelper>
            mStartupPaintPreviewHelperSupplier = new StartupPaintPreviewHelperSupplier();

    private final OneshotSupplierImpl<LayoutStateProvider> mLayoutStateProviderSupplier =
            new OneshotSupplierImpl<>();

    private final OneshotSupplierImpl<StartSurface> mStartSurfaceSupplier =
            new OneshotSupplierImpl<>();
    private final OneshotSupplierImpl<TabSwitcher> mTabSwitcherSupplier =
            new OneshotSupplierImpl<>();
    private ObservableSupplierImpl<Tab> mStartSurfaceParentTabSupplier =
            new ObservableSupplierImpl<>();
    private ObservableSupplierImpl<TabModelStartupInfo> mTabModelStartupInfoSupplier;
    // Calls isStartSurfaceRefactorEnabled() instead of using this variable directly.
    private Boolean mIsStartSurfaceRefactorEnabled;

    private CallbackController mCallbackController = new CallbackController();
    private TabbedModeTabDelegateFactory mTabDelegateFactory;

    private final AppLaunchDrawBlocker mAppLaunchDrawBlocker;

    private ReturnToChromeBackPressHandler mReturnToChromeBackPressHandler;

    // Only true if both Start surface and Start surface refactor are enabled.
    private Boolean mIsHandleTabSwitcherShownEnabled;
    private ReadingListBackPressHandler mReadingListBackPressHandler;
    private MinimizeAppAndCloseTabBackPressHandler mMinimizeAppAndCloseTabBackPressHandler;

    private HomeSurfaceTracker mHomeSurfaceTracker;

    // ID assigned to each ChromeTabbedActivity instance in Android S+ where multi-instance feature
    // is supported. This can be explicitly set in the incoming Intent or internally assigned.
    private int mWindowId;

    // The URL of the last active Tab read from the Tab metadata file during cold startup.
    private String mLastActiveTabUrl;

    private final IncognitoTabHost mIncognitoTabHost = new IncognitoTabHost() {
        @Override
        public boolean hasIncognitoTabs() {
            return getTabModelSelector().getModel(true).getCount() > 0;
        }

        @Override
        public void closeAllIncognitoTabs() {
            if (isActivityFinishingOrDestroyed()) return;

            // If the tabbed activity has not yet initialized, then finish the activity to avoid
            // timing issues with clearing the incognito tab state in the background.
            if (!areTabModelsInitialized() || !didFinishNativeInitialization()) {
                finish();
                return;
            }

            getTabModelSelector().getModel(true).closeAllTabs();
        }

        @Override
        public boolean isActiveModel() {
            return getTabModelSelector().getModel(true).isActiveModel();
        }
    };

    /**
     * This class is used to warm up the chrome split ClassLoader. See SplitChromeApplication for
     * more info
     */
    @UsedByReflection("SplitChromeApplication.java")
    public static class Preload extends ChromeTabbedActivity {
        private LifecycleRegistry mLifecycleRegistry;

        @UsedByReflection("SplitChromeApplication.java")
        public Preload() {}

        @Override
        public Lifecycle getLifecycle() {
            if (mLifecycleRegistry == null) {
                // LifecycleRegistry normally enforces it is called on the main thread, but this
                // class will be preloaded in a background thread. The only method that gets called
                // in the activity constructor is addObserver(), so just override that.
                mLifecycleRegistry = new LifecycleRegistry(this) {
                    @Override
                    public void addObserver(LifecycleObserver observer) {}
                };
            }
            return mLifecycleRegistry;
        }
    }

    /**
     * Constructs a ChromeTabbedActivity.
     */
    public ChromeTabbedActivity() {
        mMainIntentMetrics = new MainIntentBehaviorMetrics();

        // AppLaunchDrawBlocker may block drawing the Activity content until the initial tab is
        // available.
        // clang-format off
        mAppLaunchDrawBlocker = new AppLaunchDrawBlocker(getLifecycleDispatcher(),
                () -> findViewById(android.R.id.content),
                this::getIntent, this::shouldIgnoreIntent, this::isTablet,
                this::shouldShowOverviewPageOnStart, this::isInstantStartEnabled,
                mTabModelProfileSupplier,
                new IncognitoRestoreAppLaunchDrawBlockerFactory(this::getSavedInstanceState,
                        getTabModelSelectorSupplier()));
        // clang-format on
    }

    @Override
    protected void onPreCreate() {
        super.onPreCreate();
        mMultiInstanceManager = MultiInstanceManager.create(this, getTabModelOrchestratorSupplier(),
                getMultiWindowModeStateDispatcher(), getLifecycleDispatcher(),
                getModalDialogManagerSupplier(), this);
        StartSurfaceUserData.reset();
        mBackPressManager.setFallbackOnBackPressed(() -> {
            if (BackPressManager.correctTabNavigationOnFallback()) {
                if (getToolbarManager() != null && getToolbarManager().back()) {
                    return;
                }
            }
            minimizeAppAndCloseTabOnBackPress(getActivityTab());
        });
    }

    @Override
    protected @LaunchIntentDispatcher.Action int maybeDispatchLaunchIntent(
            Intent intent, Bundle savedInstanceState) {
        // Detect if incoming intent is a result of Chrome recreating itself. For now, restrict this
        // path to reparenting to ensure the launching logic isn't disrupted.
        // TODO(crbug.com/1065491): Unlock this codepath for all incoming intents once it's
        // confirmed working and stable.
        if (savedInstanceState != null
                && AsyncTabParamsManagerSingleton.getInstance().hasParamsWithTabToReparent()) {
            return LaunchIntentDispatcher.Action.CONTINUE;
        }

        if (getClass().equals(ChromeTabbedActivity.class)
                && Intent.ACTION_MAIN.equals(intent.getAction())) {
            // Call dispatchToTabbedActivity() for MAIN intents to activate proper multi-window
            // TabbedActivity (i.e. if CTA2 is currently running and Chrome is started, CTA2
            // should be brought to front). Don't call dispatchToTabbedActivity() for non-MAIN
            // intents to avoid breaking cases where CTA is started explicitly (e.g. to handle
            // 'Move to other window' command from CTA2).
            return LaunchIntentDispatcher.dispatchToTabbedActivity(this, intent);
        }
        @LaunchIntentDispatcher.Action
        int action = maybeDispatchExplicitMainViewIntent(intent, DispatchedBy.ON_CREATE);
        if (action != LaunchIntentDispatcher.Action.CONTINUE) {
            return action;
        }
        return super.maybeDispatchLaunchIntent(intent, savedInstanceState);
    }

    // We know of at least one app that explicitly specifies .Main activity in custom tab
    // intents. The app shouldn't be doing that, but until it's updated, we need to support
    // such use case.
    //
    // This method attempts to treat VIEW intents explicitly sent to .Main as custom tab
    // intents, and dispatch them accordingly. If the intent was not dispatched, the method
    // returns Action.CONTINUE.
    //
    // The method also updates the supplied boolean histogram with the dispatching result,
    // but only if the intent is a VIEW intent sent explicitly to .Main activity.
    private @LaunchIntentDispatcher.Action int maybeDispatchExplicitMainViewIntent(
            Intent intent, @DispatchedBy int dispatchedBy) {
        // The first check ensures that this is .Main activity alias (we can't check exactly, but
        // this gets us sufficiently close).
        if (getClass().equals(ChromeTabbedActivity.class)
                && Intent.ACTION_VIEW.equals(intent.getAction()) && intent.getComponent() != null
                && MAIN_LAUNCHER_ACTIVITY_NAME.equals(intent.getComponent().getClassName())) {
            @LaunchIntentDispatcher.Action
            int action = LaunchIntentDispatcher.dispatchToCustomTabActivity(this, intent);
            switch (dispatchedBy) {
                case DispatchedBy.ON_CREATE:
                case DispatchedBy.ON_NEW_INTENT:
                    break;
                default:
                    assert false : "Unknown dispatchedBy value " + dispatchedBy;
            }
            if (action == LaunchIntentDispatcher.Action.CONTINUE) {
                // Intent was not dispatched, record its source.
                @IntentHandler.ExternalAppId
                int externalId = IntentHandler.determineExternalIntentSource(intent);

                // Crash if intent came from us, but only in debug builds and only if we weren't
                // explicitly told not to. Hopefully we'll get enough reports to find where
                // these intents come from.
                if (externalId == IntentHandler.ExternalAppId.CHROME && BuildInfo.isDebugApp()
                        && !CommandLine.getInstance().hasSwitch(
                                ChromeSwitches.DONT_CRASH_ON_VIEW_MAIN_INTENTS)) {
                    String intentInfo = intent.toString();
                    Bundle extras = intent.getExtras();
                    if (extras != null) {
                        intentInfo +=
                                ", extras.keySet = [" + TextUtils.join(", ", extras.keySet()) + "]";
                    }
                    String message = String.format((Locale) null,
                            "VIEW intent sent to .Main activity alias was not dispatched. PLEASE "
                                    + "report the following info to crbug.com/789732: \"%s\". Use "
                                    + "--%s flag to disable this check.",
                            intentInfo, ChromeSwitches.DONT_CRASH_ON_VIEW_MAIN_INTENTS);
                    throw new IllegalStateException(message);
                }
            }
            return action;
        }
        return LaunchIntentDispatcher.Action.CONTINUE;
    }

    @Override
    public void initializeCompositor() {
        try {
            TraceEvent.begin("ChromeTabbedActivity.initializeCompositor");
            super.initializeCompositor();

            // LocaleManager can only function after the native library is loaded.
            mLocaleManager = LocaleManager.getInstance();
            mLocaleManager.setSettingsLauncher(SETTINGS_LAUNCHER);
            mLocaleManager.showSearchEnginePromoIfNeeded(this, null);

            mTabModelOrchestrator.onNativeLibraryReady(getTabContentManager());

            // For saving non-incognito tab closures for Recent Tabs.
            mHistoricalTabModelObserver =
                    new HistoricalTabModelObserver(mTabModelSelector.getModel(false));

            // Defer initialization of this helper so it triggers after TabModelFilter
            // observers.
            UndoRefocusHelper.initialize(
                    this, mTabModelSelector, getLayoutManagerSupplier(), isTablet());

            mTabModelObserver = new TabModelSelectorTabModelObserver(mTabModelSelector) {
                @Override
                public void onFinishingTabClosure(Tab tab) {
                    closeIfNoTabsAndHomepageEnabled(false);
                }

                @Override
                public void tabPendingClosure(Tab tab) {
                    closeIfNoTabsAndHomepageEnabled(true);
                }

                @Override
                public void multipleTabsPendingClosure(List<Tab> tabs, boolean isAllTabs) {
                    closeIfNoTabsAndHomepageEnabled(true);
                }

                @Override
                public void tabRemoved(Tab tab) {
                    closeIfNoTabsAndHomepageEnabled(false);
                }

                private void closeIfNoTabsAndHomepageEnabled(boolean isPendingClosure) {
                    if (getTabModelSelector().getTotalTabCount() == 0) {
                        // If the last tab is closed, and homepage is enabled, then exit Chrome.
                        if (HomepageManager.shouldCloseAppWithZeroTabs()) {
                            finish();
                        } else if (isPendingClosure) {
                            NewTabPageUma.recordNTPImpression(
                                    NewTabPageUma.NTP_IMPESSION_POTENTIAL_NOTAB);
                        }
                    }
                }

                @Override
                public void didAddTab(Tab tab, @TabLaunchType int type,
                        @TabCreationState int creationState, boolean markedForSelection) {
                    if (type == TabLaunchType.FROM_LONGPRESS_BACKGROUND
                            || type == TabLaunchType.FROM_LONGPRESS_BACKGROUND_IN_GROUP
                            || type == TabLaunchType.FROM_RECENT_TABS
                                    && !DeviceClassManager.enableAnimations()) {
                        Toast.makeText(ChromeTabbedActivity.this, R.string.open_in_new_tab_toast,
                                     Toast.LENGTH_SHORT)
                                .show();
                    }
                }
            };
        } finally {
            TraceEvent.end("ChromeTabbedActivity.initializeCompositor");
        }
    }

    private void refreshSignIn() {
        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity.refreshSignIn")) {
            FirstRunSignInProcessor.openSyncSettingsIfScheduled(this);
            BackupSigninProcessor.start(this);
        }
    }

    private void setupCompositorContentPreNativeForPhone() {
        if (isTablet()) return;

        try (TraceEvent e = TraceEvent.scoped(
                     "ChromeTabbedActivity.setupCompositorContentPreNativeForPhone")) {
            CompositorViewHolder compositorViewHolder = getCompositorViewHolderSupplier().get();

            // TODO(1239025): Remove all GTS enabled checks after GTS is enabled by default on
            // tablets.
            if (TabUiFeatureUtilities.isGridTabSwitcherEnabled(this)) {
                createTabSwitcherOrStartSurface(compositorViewHolder, compositorViewHolder);
            }

            // clang-format off
            mLayoutManager = new LayoutManagerChromePhone(compositorViewHolder, mContentContainer,
                    mStartSurfaceSupplier, mTabSwitcherSupplier, getBrowserControlsManager(),
                    getTabContentManagerSupplier(), mRootUiCoordinator::getTopUiThemeColorProvider);
            mLayoutStateProviderSupplier.set(mLayoutManager);
            // clang-format on
        }
    }

    private void setupCompositorContentPreNativeForTablet() {
        if (!isTablet()) return;

        try (TraceEvent e = TraceEvent.scoped(
                     "ChromeTabbedActivity.setupCompositorContentPreNativeForTablet")) {
            CompositorViewHolder compositorViewHolder = getCompositorViewHolderSupplier().get();

            // clang-format off
            ViewGroup tabSwitcherViewHolder = findViewById(R.id.tab_switcher_view_holder);
            View toolbarContainerView = findViewById(R.id.toolbar_container);
            mLayoutManager = new LayoutManagerChromeTablet(compositorViewHolder, mContentContainer,
                mStartSurfaceSupplier, mTabSwitcherSupplier, getBrowserControlsManager(),
                getTabContentManagerSupplier(), mRootUiCoordinator::getTopUiThemeColorProvider,
                mTabModelStartupInfoSupplier, tabSwitcherViewHolder,
                mRootUiCoordinator.getScrimCoordinator(), getLifecycleDispatcher(),
                () -> createAndSetStartSurfaceForTablet(), mMultiInstanceManager,
                toolbarContainerView);
            mLayoutStateProviderSupplier.set(mLayoutManager);
            // clang-format on
        }
    }

    private void createTabSwitcherOrStartSurface(
            CompositorViewHolder compositorViewHolder, ViewGroup tabSwitcherContainer) {
        // If the refactor is enabled, we create grid tab switcher directly instead of via start
        // surface.
        if (isStartSurfaceRefactorEnabled()) {
            createGridTabSwitcher(compositorViewHolder, tabSwitcherContainer);
            if (ReturnToChromeUtil.isStartSurfaceEnabled(this)) {
                createStartSurface(compositorViewHolder, tabSwitcherContainer);
            }
        } else if (TabUiFeatureUtilities.isGridTabSwitcherEnabled(this)) {
            createStartSurface(compositorViewHolder, tabSwitcherContainer);
        }
    }

    private void createStartSurface(
            CompositorViewHolder compositorViewHolder, ViewGroup tabSwitcherContainer) {
        StartSurfaceDelegate.createStartSurface(this, mRootUiCoordinator.getScrimCoordinator(),
                mRootUiCoordinator.getBottomSheetController(), mStartSurfaceSupplier,
                mStartSurfaceParentTabSupplier, hadWarmStart(), getWindowAndroid(),
                tabSwitcherContainer, compositorViewHolder::getDynamicResourceLoader,
                getTabModelSelector(), getBrowserControlsManager(), getSnackbarManager(),
                getShareDelegateSupplier(), getToolbarManager()::getOmniboxStub,
                getTabContentManager(), getModalDialogManager(),
                /* chromeActivityNativeDelegate= */ this, getLifecycleDispatcher(),
                getTabCreatorManagerSupplier().get(), getMenuOrKeyboardActionController(),
                getMultiWindowModeStateDispatcher(), getToolbarManager()::getToolbar,
                mBackPressManager, mRootUiCoordinator.getIncognitoReauthControllerSupplier(),
                v -> onTabSwitcherClicked(), mTabModelProfileSupplier);
    }

    private void createGridTabSwitcher(
            CompositorViewHolder compositorViewHolder, ViewGroup tabSwitcherContainer) {
        mTabSwitcherSupplier.set(TabManagementDelegateProvider.getDelegate().createGridTabSwitcher(
                this, getLifecycleDispatcher(), getTabModelSelector(), getTabContentManager(),
                getBrowserControlsManager(), getTabCreatorManagerSupplier().get(),
                getMenuOrKeyboardActionController(), tabSwitcherContainer,
                getMultiWindowModeStateDispatcher(), mRootUiCoordinator.getScrimCoordinator(),
                /* rootView= */ tabSwitcherContainer,
                compositorViewHolder::getDynamicResourceLoader, getSnackbarManager(),
                getModalDialogManager(), mRootUiCoordinator.getIncognitoReauthControllerSupplier(),
                mBackPressManager, mLayoutStateProviderSupplier));
    }

    private void setupCompositorContentPostNative() {
        try (TraceEvent e = TraceEvent.scoped(
                     "ChromeTabbedActivity.setupCompositorContentPostNative")) {
            if (!isLayoutManagerCreated()) {
                if (isTablet()) {
                    setupCompositorContentPreNativeForTablet();
                } else {
                    setupCompositorContentPreNativeForPhone();
                }
            }

            mLayoutManager.setEnableAnimations(DeviceClassManager.enableAnimations());
        }
    }

    private void initializeCompositorContent() {
        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity.initializeCompositorContent")) {
            // TODO(yusufo): get rid of findViewById(R.id.url_bar).
            initializeCompositorContent(mLayoutManager, findViewById(R.id.url_bar),
                    mContentContainer, mControlContainer);
        }
    }

    private boolean isLayoutManagerCreated() {
        return mLayoutManager != null;
    }

    private void onTabSwitcherClicked() {
        Profile profile = mTabModelProfileSupplier.get();
        if (profile != null) {
            TrackerFactory.getTrackerForProfile(profile).notifyEvent(
                    EventConstants.TAB_SWITCHER_BUTTON_CLICKED);
        }

        if (getFullscreenManager().getPersistentFullscreenMode()) {
            return;
        }

        ReturnToChromeUtil.recordClickTabSwitcher(
                isInOverviewMode(), getTabModelSelector().getCurrentTab());

        showOverview(StartSurfaceState.SHOWING_TABSWITCHER);
    }

    private void initializeToolbarManager() {
        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity.initializeToolbarManager")) {
            mUndoBarPopupController.initialize();

            OnClickListener newTabClickHandler = v -> {
                getTabModelSelector().getModel(false).commitAllTabClosures();
                // This assumes that the keyboard can not be seen at the same time as the
                // newtab button on the toolbar.
                int tabLaunchType =
                        (getLayoutManager().getActiveLayoutType() == LayoutType.TAB_SWITCHER)
                        ? TabLaunchType.FROM_TAB_SWITCHER_UI
                        : TabLaunchType.FROM_CHROME_UI;
                getCurrentTabCreator().launchNTP(tabLaunchType);
                mLocaleManager.showSearchEnginePromoIfNeeded(ChromeTabbedActivity.this, null);
                if (getTabModelSelector().isIncognitoSelected()) {
                    RecordUserAction.record("MobileToolbarStackViewNewIncognitoTab");
                } else {
                    RecordUserAction.record("MobileToolbarStackViewNewTab");
                }
                RecordUserAction.record("MobileTopToolbarNewTabButton");

                RecordUserAction.record("MobileNewTabOpened");
            };
            OnClickListener bookmarkClickHandler =
                    v -> mTabBookmarkerSupplier.get().addOrEditBookmark(getActivityTab());

            Supplier<Boolean> showStartSurfaceSupplier = () -> {
                // If incognito is selected, tapping the home button stays on the current incognito
                // tab.
                if (ReturnToChromeUtil.shouldShowStartSurfaceAsTheHomePageOnPhone(this, isTablet())
                        && !mTabModelSelector.isIncognitoSelected()) {
                    StartSurfaceUserData.setKeepTab(getActivityTab(), true);
                    showOverview(StartSurfaceState.SHOWING_HOMEPAGE);
                    return true;
                }
                return false;
            };

            getToolbarManager().initializeWithNative(mLayoutManager,
                    v
                    -> onTabSwitcherClicked(),
                    newTabClickHandler, bookmarkClickHandler, null, showStartSurfaceSupplier);

            if (!isInstantStartEnabled()) {
                // TODO(https://crbug.com/1306904): Fix this assert which is tripping on unrelated
                // tests.
                // assert !(mOverviewModeController != null
                //         && mOverviewModeController.overviewVisible());
            }
        }
    }

    private ViewGroup createAndSetStartSurfaceForTablet() {
        assert isTablet();
        final long startTimeMs = SystemClock.uptimeMillis();
        CompositorViewHolder compositorViewHolder = getCompositorViewHolderSupplier().get();
        ViewGroup containerView = compositorViewHolder;
        // Inflate view holder for polish GTS.
        containerView =
                (ViewGroup) ((ViewStub) findViewById(R.id.tab_switcher_view_holder_stub)).inflate();
        // Set view in toolbar manager to set toolbar stub.
        getToolbarManager().setTabSwitcherFullScreenView(containerView);

        // create start surface.
        createTabSwitcherOrStartSurface(compositorViewHolder, containerView);
        RecordHistogram.recordTimesHistogram(
                TAB_SWITCHER_CREATION_TIME, SystemClock.uptimeMillis() - startTimeMs);
        return containerView;
    }

    private void maybeCreateIncognitoTabSnapshotController() {
        try (TraceEvent e = TraceEvent.scoped(
                     "ChromeTabbedActivity.maybeCreateIncognitoTabSnapshotController")) {
            if (!CommandLine.getInstance().hasSwitch(
                        ChromeSwitches.ENABLE_INCOGNITO_SNAPSHOTS_IN_ANDROID_RECENTS)) {
                IncognitoTabbedSnapshotController.createIncognitoTabSnapshotController(
                        this, mLayoutManager, mTabModelSelector, getLifecycleDispatcher());
            }

            mUIWithNativeInitialized = true;
            onAccessibilityTabSwitcherModeChanged();

            // The dataset has already been created, we need to initialize our state.
            mTabModelSelector.notifyChanged();

            // Check for incognito tabs to handle the case where Chrome was swiped away in the
            // background.
            if (!IncognitoTabHostUtils.doIncognitoTabsExist()) {
                IncognitoNotificationManager.dismissIncognitoNotification();
                DownloadNotificationService.getInstance().cancelOffTheRecordDownloads();
            }
        }
    }

    private void maybeGetFeedAppLifecycleAndMaybeCreatePageViewObserver() {
        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity."
                     + "maybeGetFeedAppLifecycleAndMaybeCreatePageViewObserver")) {
            FeedSurfaceTracker.getInstance().startup();

            UsageStatsService.createPageViewObserverIfEnabled(
                    this, getActivityTabProvider(), getTabContentManagerSupplier());
        }
    }

    private void initJourneyManager() {
        assert mLayoutManager != null;

        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity.initJourneyManager")) {
            if (ChromeFeatureList.isEnabled(ChromeFeatureList.TAB_ENGAGEMENT_REPORTING_ANDROID)) {
                // The lifecycle of this object is managed by the lifecycle dispatcher.
                new JourneyManager(getTabModelSelector(), getLifecycleDispatcher(), mLayoutManager,
                        new EngagementTimeUtil());
            }
        }
    }

    @Override
    public void onNewIntent(Intent intent) {
        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity.onNewIntent")) {
            // Drop the cleaner intent since it's created in order to clear up the OS share sheet.
            if (ShareHelper.isCleanerIntent(intent)) {
                return;
            }

            // The intent to use in maybeDispatchExplicitMainViewIntent(). We're explicitly
            // adding NEW_TASK flag to make sure backing from CCT brings up the caller activity,
            // and not Chrome
            Intent intentForDispatching = new Intent(intent);
            intentForDispatching.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            @LaunchIntentDispatcher.Action
            int action = maybeDispatchExplicitMainViewIntent(
                    intentForDispatching, DispatchedBy.ON_NEW_INTENT);
            if (action != LaunchIntentDispatcher.Action.CONTINUE) {
                // Pressing back button in CCT should bring user to the caller activity.
                moveTaskToBack(true);
                // Intent was dispatched to CustomTabActivity, consume it.
                return;
            }

            mIntentHandlingTimeMs = SystemClock.uptimeMillis();
            super.onNewIntent(intent);

            boolean shouldShowRegularOverviewMode = IntentUtils.safeGetBooleanExtra(
                    intent, IntentHandler.EXTRA_OPEN_REGULAR_OVERVIEW_MODE, false);
            if (shouldShowRegularOverviewMode && IntentHandler.wasIntentSenderChrome(intent)) {
                mTabModelSelector.selectModel(/*incognito= */ false);
                mLayoutManager.showLayout(LayoutType.TAB_SWITCHER, /*animate= */ false);
            }
        }
    }

    @Override
    public void startNativeInitialization() {
        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity.startNativeInitialization")) {
            // This is on the critical path so don't delay.
            setupCompositorContentPostNative();
            if (ChromeFeatureList.isEnabled(ChromeFeatureList.SPLIT_COMPOSITOR_TASK)
                    && (!DeviceFormFactor.isTablet()
                            || ChromeFeatureList.getFieldTrialParamByFeatureAsBoolean(
                                    ChromeFeatureList.SPLIT_COMPOSITOR_TASK, "enable_on_tablet",
                                    false))) {
                PostTask.postTask(TaskTraits.UI_DEFAULT,
                        mCallbackController.makeCancelable(this::initializeCompositorContent));
            } else {
                initializeCompositorContent();
            }

            // All this initialization can be expensive so it's split into multiple tasks.
            PostTask.postTask(
                    TaskTraits.UI_DEFAULT, mCallbackController.makeCancelable(this::refreshSignIn));
            PostTask.postTask(TaskTraits.UI_DEFAULT,
                    mCallbackController.makeCancelable(this::initializeToolbarManager));
            PostTask.postTask(TaskTraits.UI_DEFAULT,
                    mCallbackController.makeCancelable(
                            this::maybeCreateIncognitoTabSnapshotController));
            if (BackPressManager.isEnabled()) {
                PostTask.postTask(TaskTraits.UI_DEFAULT, this::initializeBackPressHandlers);
            }
            PostTask.postTask(TaskTraits.UI_DEFAULT,
                    mCallbackController.makeCancelable(
                            this::onAccessibilityTabSwitcherModeChanged));

            PostTask.postTask(TaskTraits.UI_DEFAULT,
                    mCallbackController.makeCancelable(
                            this::maybeGetFeedAppLifecycleAndMaybeCreatePageViewObserver));
            PostTask.postTask(TaskTraits.UI_DEFAULT,
                    mCallbackController.makeCancelable(this::initJourneyManager));
            PostTask.postTask(TaskTraits.UI_DEFAULT,
                    mCallbackController.makeCancelable(this::finishNativeInitialization));
            ChromeAccessibilityUtil.get().addObserver(this);
        }
    }

    @Override
    public void finishNativeInitialization() {
        try (TraceEvent te = TraceEvent.scoped("ChromeTabbedActivity.finishNativeInitialization")) {
            super.finishNativeInitialization();

            // TODO(jinsukkim): Let these classes handle the registration by themselves.
            mCompositorViewHolder = getCompositorViewHolderSupplier().get();
            mOverviewListLayout = (OverviewListLayout) mLayoutManager.getOverviewListLayout();
            getTabObscuringHandler().addObserver(mCompositorViewHolder);
            getTabObscuringHandler().addObserver(mOverviewListLayout);

            ChromeAccessibilityUtil.get().addObserver(mLayoutManager);
            if (isTablet()) {
                ChromeAccessibilityUtil.get().addObserver(mCompositorViewHolder);
            }

            if (mIsHandleTabSwitcherShownEnabled == null) {
                mIsHandleTabSwitcherShownEnabled = !isTablet() && isStartSurfaceRefactorEnabled()
                        && ReturnToChromeUtil.isStartSurfaceEnabled(this);
            }

            mInactivityTracker.setLastVisibleTimeMsAndRecord(System.currentTimeMillis());
        }
    }

    @Override
    public void onResumeWithNative() {
        // On warm startup, call setInitialOverviewState in onResume() instead of onStart(). This is
        // because onResume() is guaranteed to called after onNewIntent() and thus have the updated
        // Intent which is used by shouldShowOverviewPageOnStart(). See https://crbug.com/1321607.
        if (mFromResumption) {
            setInitialOverviewState(shouldShowOverviewPageOnStart());
        } else {
            // Set mFromResumption to be true to skip the call of setInitialOverviewState() in
            // onStart() when the next time onStart() is called, since it is no longer a cold start.
            mFromResumption = true;
        }

        super.onResumeWithNative();

        IncognitoStartup.onResumeWithNative(
                getTabModelSelectorSupplier(), TABBED_MODE_COMPONENT_NAMES);

        mLocaleManager.setSnackbarManager(getSnackbarManager());
        mLocaleManager.startObservingPhoneChanges();

        if (isWarmOnResume()) {
            NavigationPredictorBridge.onActivityWarmResumed();
        } else {
            NavigationPredictorBridge.onColdStart();
        }

        // This call is not guarded by a feature flag.
        SearchEngineChoiceNotification.handleSearchEngineChoice(
                this, getSnackbarManager(), SETTINGS_LAUNCHER);

        if (!isWarmOnResume()) {
            SuggestionsMetrics.recordArticlesListVisible();
        } else {
            mInactivityTracker.setLastVisibleTimeMsAndRecord(System.currentTimeMillis());
        }

        FeatureNotificationUtils.handleIntentIfApplicable(getIntent());
    }

    @Override
    public void onPauseWithNative() {
        mTabModelSelector.commitAllTabClosures();
        CookiesFetcher.persistCookies();

        mLocaleManager.setSnackbarManager(null);
        mLocaleManager.stopObservingPhoneChanges();

        NavigationPredictorBridge.onPause();
        // Always track the last backgrounded time in case others are using the pref.
        mInactivityTracker.setLastBackgroundedTimeInPrefs(System.currentTimeMillis());

        super.onPauseWithNative();
    }

    @Override
    public void onStopWithNative() {
        super.onStopWithNative();

        saveState();
        mHasDeterminedOverviewStateForCurrentSession = false;
    }

    @Override
    public void onStartWithNative() {
        mMainIntentMetrics.logLaunchBehavior();
        super.onStartWithNative();

        // Don't call setInitialOverviewState if 1) we're waiting for the tab's creation or we risk
        // showing a glimpse of the tab selector during start up. 2) on warm startup from an
        // resumption. Defer it to onResumeWitheNative() since it needs to check the latest Intent
        // which is only guaranteed to be updated onResume() if onNewIntent() is called.
        if (!mPendingInitialTabCreation && !mFromResumption) {
            setInitialOverviewState(shouldShowOverviewPageOnStart());
        }

        Bundle savedInstanceState = getSavedInstanceState();
        if (savedInstanceState != null
                && savedInstanceState.getBoolean(IS_INCOGNITO_SELECTED, false)) {
            // This will be executed only once since SavedInstanceState will be reset a few lines
            // later.
            AndroidSessionDurationsServiceState.restoreNativeFromSerialized(savedInstanceState,
                    getCurrentTabModel().getProfile().getPrimaryOTRProfile(
                            /* createIfNeeded= */ true));
        }

        resetSavedInstanceState();
        ReturnToChromeUtil.addFeedVisibilityObserver();
        BookmarkUtils.maybeExpireLastBookmarkLocationForReadLater(
                mInactivityTracker.getTimeSinceLastBackgroundedMs());
    }

    @Override
    public void onNewIntentWithNative(Intent intent) {
        try {
            TraceEvent.begin("ChromeTabbedActivity.onNewIntentWithNative");

            super.onNewIntentWithNative(intent);
            if (IntentUtils.isMainIntentFromLauncher(intent)) {
                logMainIntentBehavior(intent);
            }

            if (CommandLine.getInstance().hasSwitch(ContentSwitches.ENABLE_TEST_INTENTS)) {
                handleDebugIntent(intent);
            }

        } finally {
            TraceEvent.end("ChromeTabbedActivity.onNewIntentWithNative");
        }
    }

    @Override
    public @ActivityType int getActivityType() {
        return ActivityType.TABBED;
    }

    @Override
    public ChromeTabCreator getTabCreator(boolean incognito) {
        return (ChromeTabCreator) super.getTabCreator(incognito);
    }

    @Override
    public ChromeTabCreator getCurrentTabCreator() {
        return (ChromeTabCreator) super.getCurrentTabCreator();
    }

    /**
     * @return The toolbar button in-product help controller for this activity.
     * TODO(pnoland, https://crbug.com/865801): remove this in favor
     *        of injecting the controller directly where it's needed.
     */
    public ToolbarButtonInProductHelpController getToolbarButtonInProductHelpController() {
        return ((TabbedRootUiCoordinator) mRootUiCoordinator)
                .getToolbarButtonInProductHelpController();
    }

    private void handleDebugIntent(Intent intent) {
        if (ACTION_CLOSE_TABS.equals(intent.getAction())) {
            getTabModelSelector().closeAllTabs();
        } else if (MemoryPressureListener.handleDebugIntent(
                           ChromeTabbedActivity.this, intent.getAction())) {
            // Handled.
        }
    }

    private void setTrackColdStartupMetrics(boolean shouldTrackColdStartupMetrics) {
        assert getActivityTabStartupMetricsTracker() != null;

        if (shouldTrackColdStartupMetrics) {
            getActivityTabStartupMetricsTracker().setHistogramSuffix(ActivityType.TABBED);
        } else {
            getActivityTabStartupMetricsTracker().cancelTrackingStartupMetrics();
        }

        // Paint Preview should follow the same logic as startup UMA histograms as the feature
        // should only run on cold startup of Chrome when the user is unable to interact before
        // entering a tab.
        StartupPaintPreviewHelper.setShouldShowOnRestore(shouldTrackColdStartupMetrics);
    }

    private void setInitialOverviewState(boolean shouldShowOverviewPageOnStart) {
        if (isTablet()) {
            if (mFromResumption) {
                setInitialOverviewStateOnTablets();
            }
            return;
        }
        if (mHasDeterminedOverviewStateForCurrentSession) return;

        mHasDeterminedOverviewStateForCurrentSession = true;
        boolean isOverviewVisible = isInOverviewMode();

        if (shouldShowOverviewPageOnStart && !isOverviewVisible) {
            mOverviewShownOnStart = true;
            // Cancel recording cold startup metrics if an overview is shown as they expect a tab to
            // be the first thing shown after startup.
            setTrackColdStartupMetrics(false);
            showOverview(StartSurfaceState.SHOWING_START);
            mAppLaunchDrawBlocker.onOverviewPageAvailable(
                    mOverviewShownOnStart && !isInstantStartEnabled());
            return;
        }

        if (getActivityTab() == null && !isOverviewVisible
                && ReturnToChromeUtil.isStartSurfaceEnabled(this)) {
            mOverviewShownOnStart = true;
            // Cancel recording cold startup metrics if an overview is shown as they expect a tab to
            // be the first thing shown after startup.
            setTrackColdStartupMetrics(false);
            showOverview(StartSurfaceState.SHOWING_START);
        }

        if (IntentUtils.isMainIntentFromLauncher(getIntent()) && isInOverviewMode()) {
            RecordUserAction.record("MobileStartup.UserEnteredTabSwitcher");
        }
        mAppLaunchDrawBlocker.onOverviewPageAvailable(
                mOverviewShownOnStart && !isInstantStartEnabled());
    }

    /**
     * Called on warm startup on tablets to show a home surface instead of the last active Tab if
     * the user has left Chrome for a while.
     */
    private void setInitialOverviewStateOnTablets() {
        ReturnToChromeUtil.setInitialOverviewStateOnResumeOnTablet(
                mTabModelSelector.isIncognitoSelected(), shouldShowNtpHomeSurfaceOnStartup(),
                getCurrentTabModel(), getTabCreator(false), mHomeSurfaceTracker);
    }

    private void logMainIntentBehavior(Intent intent) {
        assert IntentUtils.isMainIntentFromLauncher(intent);
        // TODO(tedchoc): We should cache the last visible time and reuse it to avoid different
        //                values of this depending on when it is called after the activity was
        //                shown.

        // Temporary safety check to make sure none of this code runs if the feature is
        // disabled.
        if (ReengagementNotificationController.isEnabled()) {
            if (mCallbackController != null) {
                new OneShotCallback<>(
                        mTabModelProfileSupplier, mCallbackController.makeCancelable(profile -> {
                            assert profile != null : "Unexpectedly null profile from TabModel.";
                            if (profile == null) return;

                            TrackerFactory.getTrackerForProfile(profile).notifyEvent(
                                    EventConstants.STARTED_FROM_MAIN_INTENT);
                        }));
            }
        }

        mMainIntentMetrics.onMainIntentWithNative(
                mInactivityTracker.getTimeSinceLastBackgroundedMs());
    }

    /** Access the main intent metrics for test validation. */
    public MainIntentBehaviorMetrics getMainIntentBehaviorMetricsForTesting() {
        return mMainIntentMetrics;
    }

    public ChromeInactivityTracker getInactivityTrackerForTesting() {
        return mInactivityTracker;
    }

    @Override
    public void initializeState() {
        // This method goes through 3 steps:
        // 1. Load the saved tab state (but don't start restoring the tabs yet).
        // 2. Process the Intent that this activity received and if that should result in any
        //    new tabs, create them.  This is done after step 1 so that the new tab gets
        //    created after previous tab state was restored.
        // 3. If no tabs were created in any of the above steps, create an NTP, otherwise
        //    start asynchronous tab restore (loading the previously active tab synchronously
        //    if no new tabs created in step 2).

        // Only look at the original intent if this is not a "restoration" and we are allowed to
        // process intents. Any subsequent intents are carried through onNewIntent.
        try {
            TraceEvent.begin("ChromeTabbedActivity.initializeState");

            super.initializeState();
            Log.i(TAG, "#initializeState");
            Intent intent = getIntent();

            boolean hadCipherData =
                    CipherFactory.getInstance().restoreFromBundle(getSavedInstanceState());

            boolean noRestoreState =
                    CommandLine.getInstance().hasSwitch(ChromeSwitches.NO_RESTORE_STATE);
            boolean shouldShowHomeSurfaceAtStartupOnTablet = false;
            final AtomicBoolean isActiveUrlNTP = new AtomicBoolean(false);
            if (noRestoreState) {
                // Clear the state files because they are inconsistent and useless from now on.
                mTabModelOrchestrator.clearState();
            } else {
                // State should be clear when we start first run and hence we do not need to load
                // a previous state. This may change the current Model, watch out for initialization
                // based on the model.
                // Never attempt to restore incognito tabs when this activity was previously swiped
                // away in Recents. http://crbug.com/626629
                boolean ignoreIncognitoFiles = !hadCipherData;

                // If the Start surface should be shown on startup, check if the active tab restored
                // from disk is an NTP that can be reused for Start.
                Callback<String> onStandardActiveIndexRead = null;
                shouldShowHomeSurfaceAtStartupOnTablet = shouldShowNtpHomeSurfaceOnStartup();
                boolean skipSavingNonActiveNtps = skipSavingNonActiveNtps();
                if (skipSavingNonActiveNtps) {
                    mHomeSurfaceTracker = new HomeSurfaceTracker();
                }
                if (shouldShowHomeSurfaceAtStartupOnTablet) {
                    onStandardActiveIndexRead = url -> {
                        mLastActiveTabUrl = url;
                        if (UrlUtilities.isNTPUrl(url)) {
                            assert !mTabModelSelector.isIncognitoSelected();
                            isActiveUrlNTP.set(true);
                        }
                    };
                }
                mTabModelOrchestrator.loadState(ignoreIncognitoFiles, onStandardActiveIndexRead);
                mTabModelOrchestrator.setSkipSavingNonActiveNtps(skipSavingNonActiveNtps);
            }

            mAuxiliarySearchController =
                    AuxiliarySearchControllerFactory.createAuxiliarySearchController(
                            Profile.getLastUsedRegularProfile(), mTabModelSelector);
            if (mAuxiliarySearchController != null) {
                mAuxiliarySearchController.register(this.getLifecycleDispatcher());
            }
            mInactivityTracker.register(this.getLifecycleDispatcher());
            boolean isIntentWithEffect = false;
            boolean isMainIntentFromLauncher = false;
            if (getSavedInstanceState() == null && intent != null) {
                if (!shouldIgnoreIntent()) {
                    isIntentWithEffect = mIntentHandler.onNewIntent(intent);
                }

                if (IntentUtils.isMainIntentFromLauncher(intent)) {
                    isMainIntentFromLauncher = true;
                    logMainIntentBehavior(intent);
                }
            }

            mIntentMetadataOneshotSupplier.set(
                    new ToolbarIntentMetadata(isMainIntentFromLauncher, isIntentWithEffect));

            // If we have tabs to reparent and getSavedInstanceState() is non-null, then the tabs
            // are coming from night mode tab reparenting. In this case, reparenting happens
            // synchronously along with tab restoration so there are no tabs waiting for
            // reparenting like there are for other tab reparenting operations.
            boolean hasTabWaitingForReparenting =
                    AsyncTabParamsManagerSingleton.getInstance().hasParamsWithTabToReparent()
                    && getSavedInstanceState() == null;
            mCreatedTabOnStartup = getCurrentTabModel().getCount() > 0
                    || mTabModelOrchestrator.getRestoredTabCount() > 0 || isIntentWithEffect
                    || hasTabWaitingForReparenting;

            // We always need to try to restore tabs. The set of tabs might be empty, but at least
            // it will trigger the notification that tab restore is complete which is needed by
            // other parts of Chrome such as sync.
            boolean activeTabBeingRestored = !isIntentWithEffect
                    || (shouldShowOverviewPageOnStart()
                            && !mTabModelSelector.isIncognitoSelected());

            if (shouldShowHomeSurfaceAtStartupOnTablet && !isIntentWithEffect
                    && !hasTabWaitingForReparenting) {
                // If a home surface should be shown at startup on tablets and the last active Tab
                // is a NTP, we will reuse it to show the home surface UI. Otherwise, we'll create
                // one, and set it as the active Tab. |mLastActiveTabUrl| is null when there isn't
                // any Tab.
                if (!isActiveUrlNTP.get() && mLastActiveTabUrl != null) {
                    ReturnToChromeUtil.createNewTabAndShowHomeSurfaceUi(getTabCreator(false),
                            mHomeSurfaceTracker, mTabModelSelector, mLastActiveTabUrl, null);
                    activeTabBeingRestored = false;
                    mCreatedTabOnStartup = true;
                    mLastActiveTabUrl = null;
                }
                ReturnToChromeUtil.recordHomeSurfaceShownAtStartup();
                ReturnToChromeUtil.recordHomeSurfaceShown();
            }

            mTabModelOrchestrator.restoreTabs(activeTabBeingRestored);

            // Only create an initial tab if no tabs were restored and no intent was handled.
            // Also, check whether the active tab was supposed to be restored and that the total
            // tab count is now non zero.  If this is not the case, tab restore failed and we need
            // to create a new tab as well.
            if (!mCreatedTabOnStartup
                    || (!hasTabWaitingForReparenting && activeTabBeingRestored
                            && getTabModelSelector().getTotalTabCount() == 0)) {
                // If homepage URI is not determined, due to PartnerBrowserCustomizations provider
                // async reading, then create a tab at the async reading finished. If it takes
                // too long, just create NTP.
                mPendingInitialTabCreation = true;
                PartnerBrowserCustomizations.getInstance().setOnInitializeAsyncFinished(() -> {
                    boolean isActivityFinishingOrDestroyed = isActivityFinishingOrDestroyed();
                    PartnerBrowserCustomizations.logActivityFinishingOrDestroyed(
                            isActivityFinishingOrDestroyed);
                    if (!isActivityFinishingOrDestroyed) {
                        createInitialTab();
                    }
                }, INITIAL_TAB_CREATION_TIMEOUT_MS);
            }

            // If initial tab creation is pending, this will instead be handled when we create the
            // initial tab in #createInitialTab.
            if (!mPendingInitialTabCreation) {
                Tab currentTab = getActivityTab();
                boolean isTabNtp = isTabRegularNtp(currentTab);
                if (isTabNtp && !currentTab.isNativePage()) {
                    // This will be a NTP, but the native page hasn't been created yet. Need to wait
                    // for this to be created before allowing the toolbar to draw.
                    currentTab.addObserver(new EmptyTabObserver() {
                        @Override
                        public void onContentChanged(Tab tab) {
                            tab.removeObserver(this);
                            mAppLaunchDrawBlocker.onActiveTabAvailable(/*isTabNtp*/ true);
                        }
                    });
                } else {
                    mAppLaunchDrawBlocker.onActiveTabAvailable(isTabNtp);
                }
            }

            if (getSavedInstanceState() != null) {
                long unfoldLatencyBeginTime = getSavedInstanceState().getLong(
                        ChromeActivity.UNFOLD_LATENCY_BEGIN_TIMESTAMP);
                if (unfoldLatencyBeginTime != 0) {
                    getWindowAndroid().setUnfoldLatencyBeginTime(unfoldLatencyBeginTime);
                }
            }
        } finally {
            TraceEvent.end("ChromeTabbedActivity.initializeState");
        }
    }

    private boolean hasStartWithNativeBeenCalled() {
        int activity_state = getLifecycleDispatcher().getCurrentActivityState();
        return activity_state == ActivityLifecycleDispatcher.ActivityState.STARTED_WITH_NATIVE
                || activity_state == ActivityLifecycleDispatcher.ActivityState.RESUMED_WITH_NATIVE;
    }

    /**
     * Create an initial tab for cold start without restored tabs.
     */
    private void createInitialTab() {
        Log.i(TAG, "#createInitialTab executed.");
        mPendingInitialTabCreation = false;

        // If the start surface or grid tab switcher will be shown on start, do not create a new
        // tab.
        String url = null;
        long createInitialTabStartTime = SystemClock.elapsedRealtime();
        boolean shouldShowOverviewPageOnStart = shouldShowOverviewPageOnStart();
        if (!shouldShowOverviewPageOnStart) {
            url = HomepageManager.getHomepageUri();
            if (TextUtils.isEmpty(url)) {
                url = UrlConstants.NTP_URL;
            } else {
                // Migrate legacy NTP URLs (chrome://newtab) to the newer format
                // (chrome-native://newtab)
                if (UrlUtilities.isNTPUrl(url)) {
                    url = UrlConstants.NTP_URL;
                }
            }
            getTabCreator(false).launchUrl(url, TabLaunchType.FROM_STARTUP);
        }
        PartnerBrowserCustomizations.getInstance().onCreateInitialTab(url,
                createInitialTabStartTime, shouldShowOverviewPageOnStart, getLifecycleDispatcher(),
                HomepageManager::getHomepageCharacterizationHelper);

        // If we didn't call setInitialOverviewState() in onStartWithNative() because
        // mPendingInitialTabCreation was true then do so now.
        if (hasStartWithNativeBeenCalled()) {
            // We have to use the cached value of shouldShowOverviewPageOnStart because once a new
            // Tab is created above, the return value of shouldShowOverviewPageOnStart() may change
            // since the Tab count is increased from 0 to 1.
            setInitialOverviewState(shouldShowOverviewPageOnStart);
        }

        mAppLaunchDrawBlocker.onActiveTabAvailable(isTabRegularNtp(getActivityTab()));
    }

    @Override
    public void onAccessibilityModeChanged(boolean enabled) {
        onAccessibilityTabSwitcherModeChanged();
    }

    private void onAccessibilityTabSwitcherModeChanged() {
        if (!mUIWithNativeInitialized) return;

        boolean accessibilityTabSwitcherEnabled =
                DeviceClassManager.enableAccessibilityLayout(this);
        if (isInOverviewMode()
                && (mIsAccessibilityTabSwitcherEnabled == null
                        || mIsAccessibilityTabSwitcherEnabled
                                != DeviceClassManager.enableAccessibilityLayout(this))) {
            /**
             * If Start surface homepage is showing and launching NTP will show the Start surface
             * again, skips the calls of hideOverview() and launchNTP(). We need to check
             * {@link ReturnToChromeUtil#shouldShowStartSurfaceHomeAsNewTab(Context,
             * boolean, boolean)} to see whether Start surface can be shown when accessibility is
             * enabled.
             */
            if (mStartSurfaceSupplier.get() == null
                    || !mStartSurfaceSupplier.get().isHomepageShown()
                    || !ReturnToChromeUtil.shouldShowStartSurfaceHomeAsNewTab(
                            this, getCurrentTabModel().isIncognito(), isTablet())) {
                mLayoutManager.showLayout(LayoutType.BROWSING, true);
                if (getTabModelSelector().getCurrentModel().getCount() == 0) {
                    getCurrentTabCreator().launchNTP();
                }
            }
        }
        mIsAccessibilityTabSwitcherEnabled = accessibilityTabSwitcherEnabled;
    }

    /**
     * Internal class which performs the intent handling operations delegated by IntentHandler.
     */
    private class InternalIntentDelegate implements IntentHandler.IntentHandlerDelegate {
        /**
         * Processes a url view intent.
         *
         * @param url The url from the intent.
         */
        @Override
        public void processUrlViewIntent(LoadUrlParams loadUrlParams, @TabOpenType int tabOpenType,
                String externalAppId, int tabIdToBringToFront, Intent intent) {
            if (isActivityFinishingOrDestroyed()) {
                return;
            }
            if (isFromChrome(intent, externalAppId)) {
                RecordUserAction.record("MobileTabbedModeViewIntentFromChrome");
            } else {
                RecordUserAction.record("MobileTabbedModeViewIntentFromApp");
            }

            final String url = loadUrlParams.getUrl();
            boolean fromLauncherShortcut = IntentUtils.safeGetBooleanExtra(
                    intent, IntentHandler.EXTRA_INVOKED_FROM_SHORTCUT, false);
            boolean fromAppWidget = IntentUtils.safeGetBooleanExtra(
                    intent, IntentHandler.EXTRA_INVOKED_FROM_APP_WIDGET, false);
            boolean focus = false;

            TabModel tabModel = getCurrentTabModel();
            switch (tabOpenType) {
                case TabOpenType.REUSE_URL_MATCHING_TAB_ELSE_NEW_TAB:
                    mTabModelOrchestrator.tryToRestoreTabStateForUrl(url);
                    int tabToBeClobberedIndex = TabModelUtils.getTabIndexByUrl(tabModel, url);
                    Tab tabToBeClobbered = tabModel.getTabAt(tabToBeClobberedIndex);
                    if (tabToBeClobbered != null) {
                        TabModelUtils.setIndex(tabModel, tabToBeClobberedIndex, false);
                        tabToBeClobbered.reload();
                    } else {
                        launchIntent(loadUrlParams, externalAppId, true, intent);
                    }
                    int shortcutSource = intent.getIntExtra(
                            WebappConstants.EXTRA_SOURCE, ShortcutSource.UNKNOWN);
                    LaunchMetrics.recordHomeScreenLaunchIntoTab(url, shortcutSource);
                    if (fromAppWidget && UrlConstants.CHROME_DINO_URL.equals(url)) {
                        RecordUserAction.record("QuickActionSearchWidget.StartDinoGame");
                    }
                    break;
                case TabOpenType.BRING_TAB_TO_FRONT:
                    mTabModelOrchestrator.tryToRestoreTabStateForId(tabIdToBringToFront);

                    int tabIndex = TabModelUtils.getTabIndexById(tabModel, tabIdToBringToFront);
                    if (tabIndex == TabModel.INVALID_TAB_INDEX) {
                        TabModel otherModel =
                                getTabModelSelector().getModel(!tabModel.isIncognito());
                        tabIndex = TabModelUtils.getTabIndexById(otherModel, tabIdToBringToFront);
                        if (tabIndex != TabModel.INVALID_TAB_INDEX) {
                            getTabModelSelector().selectModel(otherModel.isIncognito());
                            TabModelUtils.setIndex(otherModel, tabIndex, false);
                        } else {
                            Log.e(TAG, "Failed to bring tab to front because it doesn't exist.");
                            return;
                        }
                    } else {
                        TabModelUtils.setIndex(tabModel, tabIndex, false);
                    }
                    break;
                case TabOpenType.CLOBBER_CURRENT_TAB:
                    // The browser triggered the intent. This happens when clicking links which
                    // can be handled by other applications (e.g. www.youtube.com links).
                    Tab currentTab = getActivityTab();
                    if (currentTab != null) {
                        RedirectHandlerTabHelper.updateIntentInTab(currentTab, intent);
                        currentTab.loadUrl(loadUrlParams);
                    } else {
                        launchIntent(loadUrlParams, externalAppId, true, intent);
                    }
                    break;
                case TabOpenType.REUSE_APP_ID_MATCHING_TAB_ELSE_NEW_TAB:
                    launchIntent(loadUrlParams, externalAppId, false, intent);
                    break;
                case TabOpenType.REUSE_TAB_MATCHING_ID_ELSE_NEW_TAB:
                    int tabId = IntentUtils.safeGetIntExtra(
                            intent, TabOpenType.REUSE_TAB_MATCHING_ID_STRING, Tab.INVALID_TAB_ID);
                    if (tabId != Tab.INVALID_TAB_ID) {
                        mTabModelOrchestrator.tryToRestoreTabStateForId(tabId);
                        int matchingTabIndex = TabModelUtils.getTabIndexById(tabModel, tabId);
                        boolean loaded = false;
                        if (matchingTabIndex != TabModel.INVALID_TAB_INDEX) {
                            Tab tab = tabModel.getTabAt(matchingTabIndex);
                            if (tab.getUrl().getSpec().equals(url)
                                    || tab.getUrl().getSpec().equals(IntentUtils.safeGetStringExtra(
                                            intent, TabOpenType.REUSE_TAB_ORIGINAL_URL_STRING))) {
                                tabModel.setIndex(
                                        matchingTabIndex, TabSelectionType.FROM_USER, false);
                                tab.loadUrl(loadUrlParams);
                                loaded = true;
                            }
                        }
                        if (!loaded) {
                            launchIntent(loadUrlParams, externalAppId, false, intent);
                        }
                    }
                    break;
                case TabOpenType.OPEN_NEW_TAB:
                    if (fromLauncherShortcut) {
                        recordLauncherShortcutAction(false);
                        reportNewTabShortcutUsed(false);
                    }

                    launchIntent(loadUrlParams, externalAppId, true, intent);
                    break;
                case TabOpenType.OPEN_NEW_INCOGNITO_TAB:
                    if (!TextUtils.equals(externalAppId, getPackageName())) {
                        assert false : "Only Chrome is allowed to open incognito tabs";
                        Log.e(TAG, "Only Chrome is allowed to open incognito tabs");
                        return;
                    }

                    if (!IncognitoUtils.isIncognitoModeEnabled()) {
                        // The incognito launcher shortcut is manipulated in #onDeferredStartup(),
                        // so it's possible for a user to invoke the shortcut before it's disabled.
                        // Quick actions search widget is installed on the home screen and may
                        // need to be updated before the incognito button is removed.
                        // Opening an incognito tab while incognito mode is disabled from somewhere
                        // besides the launcher shortcut of from quick action search widget is an
                        // error.
                        if (fromAppWidget || fromLauncherShortcut) {
                            // We are using the message introduced for quick action search widget
                            // for both the widget and the launcher shortcut here.
                            Toast.makeText(ChromeTabbedActivity.this,
                                         R.string.quick_action_search_widget_message_no_incognito,
                                         Toast.LENGTH_LONG)
                                    .show();
                        } else {
                            assert false : "Tried to open incognito tab while incognito disabled";
                            Log.e(TAG, "Tried to open incognito tab while incognito disabled");
                        }

                        return;
                    }

                    if (url == null || url.equals(UrlConstants.NTP_URL)) {
                        if (fromLauncherShortcut) {
                            getTabCreator(true).launchUrl(
                                    UrlConstants.NTP_URL, TabLaunchType.FROM_LAUNCHER_SHORTCUT);
                            recordLauncherShortcutAction(true);
                            reportNewTabShortcutUsed(true);
                        } else if (fromAppWidget) {
                            RecordUserAction.record("QuickActionSearchWidget.StartIncognito");
                            getTabCreator(true).launchUrl(
                                    UrlConstants.NTP_URL, TabLaunchType.FROM_APP_WIDGET);
                        } else if (IncognitoTabLauncher.didCreateIntent(intent)) {
                            Tab tab = getTabCreator(true).launchUrl(UrlConstants.NTP_URL,
                                    TabLaunchType.FROM_LAUNCH_NEW_INCOGNITO_TAB);
                            if (IncognitoTabLauncher.shouldFocusOmnibox(intent)) {
                                // Since the Tab is created in the foreground, its View will gain
                                // focus, and since the Tab and the URL bar are not yet in the same
                                // View hierarchy, setting the URL bar's focus here won't clear the
                                // Tab's focus. When the Tab is added to the hierarchy, we want the
                                // URL bar to retain focus, so we clear the Tab's focus here.
                                tab.getView().clearFocus();
                                focus = true;
                            }

                            IncognitoTabLauncher.recordUse();
                        } else {
                            // Used by the Account management screen to open a new incognito tab.
                            // Account management screen collects its metrics separately.
                            getTabCreator(true).launchUrl(UrlConstants.NTP_URL,
                                    TabLaunchType.FROM_CHROME_UI, intent, mIntentHandlingTimeMs);
                        }
                    } else {
                        launchIntent(loadUrlParams, externalAppId, true, intent);
                    }
                    break;
                default:
                    assert false : "Unknown TabOpenType: " + tabOpenType;
                    break;
            }

            getToolbarManager().setUrlBarFocusOnceNativeInitialized(focus,
                    focus ? OmniboxFocusReason.LAUNCH_NEW_INCOGNITO_TAB
                          : OmniboxFocusReason.UNFOCUS);

            if (tabModel.getCount() > 0 && isInOverviewMode() && !isTablet()
                    && !shouldShowOverviewPageOnStart(intent)) {
                boolean wasStartSurfaceHomepageShowing = mStartSurfaceSupplier.hasValue()
                        && mStartSurfaceSupplier.get().isHomepageShown();

                // Hides the overview page if we want to navigate the URL in the current Tab which
                // isn't visible.
                if (tabOpenType == TabOpenType.CLOBBER_CURRENT_TAB) {
                    hideOverview();
                }

                // If the Start Surface was showing, the ContentView for the currently selected Tab
                // behind the Start Surface may not yet be attached and therefore the Tab may not
                // be interactive. Notify CompositorViewHolder that content has changed, which
                // will cause the Tab's ContentView to be attached. See https://crbug.com/1457603.
                if (wasStartSurfaceHomepageShowing) mCompositorViewHolder.onContentChanged();
            }
        }

        @Override
        public long getIntentHandlingTimeMs() {
            return mIntentHandlingTimeMs;
        }

        @Override
        public void processWebSearchIntent(String query) {
            assert false;
        }

        private boolean isFromChrome(Intent intent, String externalAppId) {
            // To determine if the processed intent is from Chrome, check for any of the following:
            // 1.) The authentication token that will be added to trusted intents.
            // 2.) The app ID matches Chrome.  This value can be spoofed by other applications, but
            //     in cases where we were not able to add the authentication token this is our only
            //     indication the intent was from Chrome.
            return IntentHandler.wasIntentSenderChrome(intent)
                    || TextUtils.equals(externalAppId, getPackageName());
        }
    }

    @Override
    public void performPreInflationStartup() {
        super.performPreInflationStartup();

        // Decide whether to record startup UMA histograms. This is done  early in the main
        // Activity.onCreate() to avoid recording navigation delays when they require user input to
        // proceed. For example, FRE (First Run Experience) happens before the activity is created,
        // and triggers initialization of the native library.
        //
        // An uninitialized native library is an indication of an application start that is followed
        // by navigation immediately without user input.
        if (!LibraryLoader.getInstance().isInitialized()) {
            setTrackColdStartupMetrics(true);
        }

        supportRequestWindowFeature(Window.FEATURE_ACTION_MODE_OVERLAY);

        IncognitoTabHostRegistry.getInstance().register(mIncognitoTabHost);

        mStartupPaintPreviewHelperSupplier.attach(getWindowAndroid().getUnownedUserDataHost());
    }

    @Override
    protected RootUiCoordinator createRootUiCoordinator() {
        return new TabbedRootUiCoordinator(this, this::onOmniboxFocusChanged,
                getShareDelegateSupplier(), getActivityTabProvider(), mTabModelProfileSupplier,
                mBookmarkModelSupplier, mTabBookmarkerSupplier,
                getContextualSearchManagerSupplier(), getTabModelSelectorSupplier(),
                mStartSurfaceSupplier, mTabSwitcherSupplier, mIntentMetadataOneshotSupplier,
                mLayoutStateProviderSupplier, mStartSurfaceParentTabSupplier,
                getBrowserControlsManager(), getWindowAndroid(), getLifecycleDispatcher(),
                getLayoutManagerSupplier(),
                /* menuOrKeyboardActionController= */ this, this::getActivityThemeColor,
                getModalDialogManagerSupplier(),
                /* appMenuBlocker= */ this, this::supportsAppMenu, this::supportsFindInPage,
                getTabCreatorManagerSupplier(), getFullscreenManager(),
                getCompositorViewHolderSupplier(), getTabContentManagerSupplier(),
                this::getSnackbarManager, getActivityType(), this::isInOverviewMode,
                this::isWarmOnResume,
                /* appMenuDelegate= */ this,
                /* statusBarColorProvider= */ this, new ObservableSupplierImpl<>(),
                getIntentRequestTracker(), getControlContainerHeightResource(),
                mInsetObserverViewSupplier, this::backShouldCloseTab,
                getTabReparentingControllerSupplier(),
                // TODO(sinansahin): This currently only checks for incognito extras in the intent.
                // We should make it more robust by using more signals.
                IntentHandler.hasAnyIncognitoExtra(getIntent().getExtras()), mBackPressManager,
                getSavedInstanceState());
    }

    @Override
    protected int getControlContainerLayoutId() {
        return R.layout.control_container;
    }

    @Override
    public int getControlContainerHeightResource() {
        return R.dimen.control_container_height;
    }

    @Override
    protected int getToolbarLayoutId() {
        return isTablet() ? R.layout.toolbar_tablet : R.layout.toolbar_phone;
    }

    @Override
    public void performPostInflationStartup() {
        super.performPostInflationStartup();

        if (isFinishing()) return;

        FontPreloader.getInstance().onPostInflationStartupTabbedActivity();

        TabModelSelector tabModelSelector = getTabModelSelector();
        IncognitoProfileDestroyer.observeTabModelSelector(tabModelSelector);
        IncognitoNotificationPresenceController.observeTabModelSelector(tabModelSelector);

        // Don't show the keyboard until user clicks in.
        getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN
                | WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);

        mContentContainer = (ViewGroup) findViewById(android.R.id.content);
        mControlContainer = (ToolbarControlContainer) findViewById(R.id.control_container);

        // Instead of overriding AsyncInitializationActivity#onFirstDrawComplete like the other
        // activities, we're adding our own draw detector here because this activity's draw can be
        // blocked by AppLaunchDrawBlocker, and #onFirstDrawComplete doesn't account for that.
        FirstDrawDetector.waitForFirstDrawStrict(
                mContentContainer, () -> FontPreloader.getInstance().onFirstDrawTabbedActivity());

        Supplier<Boolean> dialogVisibilitySupplier = null;
        if (TabUiFeatureUtilities.isTabGroupsAndroidEnabled(this)) {
            dialogVisibilitySupplier = () -> {
                if (isStartSurfaceRefactorEnabled()) {
                    // The grid tab switcher is lazily initialized on tablet.
                    if (!mTabSwitcherSupplier.hasValue()) {
                        assert isTablet();
                        return false;
                    }
                }
                // Return true if dialog from either tab switcher or tab strip is visible.

                ToolbarManager toolbarManager = getToolbarManager();
                TabGroupUi tabGroupUi = toolbarManager.getTabGroupUi();
                boolean isDialogVisible = tabGroupUi != null && tabGroupUi.isTabGridDialogVisible();

                Supplier<Boolean> tabSwitcherDialogVisibilitySupplier =
                        isStartSurfaceRefactorEnabled()
                        ? mTabSwitcherSupplier.get().getTabGridDialogVisibilitySupplier()
                        : (mStartSurfaceSupplier == null || !mStartSurfaceSupplier.hasValue())
                        ? null
                        : mStartSurfaceSupplier.get().getTabGridDialogVisibilitySupplier();

                if (tabSwitcherDialogVisibilitySupplier != null) {
                    isDialogVisible = isDialogVisible || tabSwitcherDialogVisibilitySupplier.get();
                }
                return isDialogVisible;
            };
        }

        mUndoBarPopupController = new UndoBarController(
                this, mTabModelSelector, this::getSnackbarManager, dialogVisibilitySupplier);

        mInactivityTracker = new ChromeInactivityTracker(
                ChromePreferenceKeys.TABBED_ACTIVITY_LAST_BACKGROUNDED_TIME_MS_PREF);
        TabUsageTracker.initialize(this.getLifecycleDispatcher(), tabModelSelector);

        assert getActivityTabStartupMetricsTracker() != null;
        boolean shouldShowOverviewPageOnStart = shouldShowOverviewPageOnStart();
        StartSurfaceUserData.getInstance().setUnusedTabRestoredAtStartup(
                shouldShowOverviewPageOnStart);
        if (StartupPaintPreviewHelper.isEnabled()) {
            StartupPaintPreviewHelper paintPreviewHelper = new StartupPaintPreviewHelper(
                    getWindowAndroid(), getOnCreateTimestampMs(), getBrowserControlsManager(),
                    getTabModelSelector(), shouldShowOverviewPageOnStart, () -> {
                        return getToolbarManager() == null
                                ? null
                                : getToolbarManager().getProgressBarCoordinator();
                    });
            mStartupPaintPreviewHelperSupplier.set(paintPreviewHelper);
            getActivityTabStartupMetricsTracker().registerPaintPreviewObserver(paintPreviewHelper);
        }
    }

    private boolean shouldIgnoreIntent() {
        if (mShouldIgnoreIntent == null) {
            // We call this only once because mIntentHandler#shouldIgnoreIntent has side effects.
            mShouldIgnoreIntent = mIntentHandler.shouldIgnoreIntent(getIntent());
        }
        return mShouldIgnoreIntent;
    }

    @Override
    protected final void dispatchOnInflationComplete() {
        super.dispatchOnInflationComplete();

        // When the feature flag {@link ChromeFeatureList.INSTANT_START} turns on phones (not
        // tablet), a view-only start page created on Java will be shown before native is
        // initialized. The {@link prepareToShowStartPagePreNative()} is only called in a cold
        // start.
        if (ReturnToChromeUtil.isStartSurfaceEnabled(this) && isInstantStartEnabled()
                && !hadWarmStart()) {
            prepareToShowStartPagePreNative();
        }
    }

    /**
     * Prepares to show the start page before native is initialized. For example, create
     * an LayoutManagerChrome object, add overview mode observer and so on.
     */
    private void prepareToShowStartPagePreNative() {
        assert isInstantStartEnabled() && !hadWarmStart() && !mFromResumption;
        try (TraceEvent e =
                        TraceEvent.scoped("ChromeTabbedActivity.prepareToShowStartPagePreNative")) {
            setupCompositorContentPreNativeForPhone();
            getCompositorViewHolderSupplier().get().setLayoutManager(mLayoutManager);

            if (shouldShowOverviewPageOnStart()) {
                mLayoutManager.setTabModelSelector(mTabModelSelector);
                mIsAccessibilityTabSwitcherEnabled =
                        DeviceClassManager.enableAccessibilityLayout(this);
                assert !mHasDeterminedOverviewStateForCurrentSession;
                setInitialOverviewState(true /* shouldShowOverviewPageOnStart */);
            }
        }
    }

    @Override
    protected TabModelOrchestrator createTabModelOrchestrator() {
        boolean tabMergingEnabled =
                mMultiInstanceManager != null && mMultiInstanceManager.isTabModelMergingEnabled();
        mTabModelOrchestrator = new TabbedModeTabModelOrchestrator(tabMergingEnabled);
        if (ChromeFeatureList.sTabStripStartupRefactoring.isEnabled()) {
            mTabModelStartupInfoSupplier = new ObservableSupplierImpl<>();
            mTabModelOrchestrator.setStartupInfoObservableSupplier(mTabModelStartupInfoSupplier);
        }
        return mTabModelOrchestrator;
    }

    @Override
    protected void createTabModels() {
        assert mTabModelSelector == null;
        assert mWindowId != INVALID_WINDOW_ID;

        Bundle savedInstanceState = getSavedInstanceState();

        // We determine the model as soon as possible so every systems get initialized coherently.
        boolean startIncognito = savedInstanceState != null
                && savedInstanceState.getBoolean(IS_INCOGNITO_SELECTED, false);

        mNextTabPolicySupplier = new ChromeNextTabPolicySupplier(mLayoutStateProviderSupplier);

        boolean tabModelWasCreated = mTabModelOrchestrator.createTabModels(
                this, this, mNextTabPolicySupplier, mWindowId);
        if (!tabModelWasCreated) {
            finishAndRemoveTask();
            return;
        }

        if (mMultiInstanceManager != null) {
            int assignedIndex = TabWindowManagerSingleton.getInstance().getIndexForWindow(this);
            // The given index and the one computed by TabWindowManager should be one and the same.
            assert !MultiWindowUtils.isMultiInstanceApi31Enabled() || assignedIndex == mWindowId;
            mMultiInstanceManager.initialize(assignedIndex, ApplicationStatus.getTaskId(this));
        }

        mTabModelSelector = mTabModelOrchestrator.getTabModelSelector();
        mTabModelSelectorObserver = new TabModelSelectorObserver() {
            @Override
            public void onTabStateInitialized() {
                if (mMultiInstanceManager != null) {
                    mMultiInstanceManager.onTabStateInitialized();
                }

                if (!mCreatedTabOnStartup) return;

                TabModel model = mTabModelSelector.getModel(false);
                TasksUma.recordTasksUma(model);
            }
        };
        mTabModelSelector.addObserver(mTabModelSelectorObserver);

        mTabModelSelectorTabObserver = new TabModelSelectorTabObserver(mTabModelSelector) {
            @Override
            public void onDidFinishNavigationInPrimaryMainFrame(
                    Tab tab, NavigationHandle navigation) {
                if (!navigation.hasCommitted()) return;

                // Show the sync error message even if the navigation happened on incognito.
                Profile profile = mTabModelProfileSupplier.get().getOriginalProfile();

                try (TraceEvent e = TraceEvent.scoped("CheckSyncErrorOnDidFinishNavigation")) {
                    SyncErrorMessage.maybeShowMessageUi(getWindowAndroid(),
                            IdentityServicesProvider.get().getIdentityManager(profile),
                            SyncServiceFactory.getForProfile(profile));
                }
                try (TraceEvent te = TraceEvent.scoped("updateActiveWebContents")) {
                    SendTabToSelfAndroidBridge.updateActiveWebContents(tab.getWebContents());
                }
            }
        };
        mAppIndexingUtil = new AppIndexingUtil(mTabModelSelector);

        if (startIncognito) mTabModelSelector.selectModel(true);
    }

    TabModelSelectorObserver getTabModelSelectorObserverForTesting() {
        return mTabModelSelectorObserver;
    }

    boolean getCreatedTabOnStartupForTesting() {
        return mCreatedTabOnStartup;
    }

    void setCreatedTabOnStartupForTesting(boolean createdTabOnStartup) {
        mCreatedTabOnStartup = createdTabOnStartup;
    }

    @Override
    protected LaunchCauseMetrics createLaunchCauseMetrics() {
        return new TabbedActivityLaunchCauseMetrics(this);
    }

    @Override
    public AppMenuPropertiesDelegate createAppMenuPropertiesDelegate() {
        return new TabbedAppMenuPropertiesDelegate(this, getActivityTabProvider(),
                getMultiWindowModeStateDispatcher(), getTabModelSelector(), getToolbarManager(),
                getWindow().getDecorView(), this, mLayoutStateProviderSupplier,
                ReturnToChromeUtil.isStartSurfaceEnabled(this) ? mStartSurfaceSupplier : null,
                mBookmarkModelSupplier,
                ()
                        -> getTabCreator(/*incognito=*/false)
                                   .launchUrl(NewTabPageUtils.encodeNtpUrl(
                                                      NewTabPageLaunchOrigin.WEB_FEED),
                                           TabLaunchType.FROM_CHROME_UI),
                getModalDialogManager(), getSnackbarManager(),
                mRootUiCoordinator.getIncognitoReauthControllerSupplier(),
                mRootUiCoordinator.getReadAloudControllerSupplier());
    }

    private TabDelegateFactory getTabDelegateFactory() {
        if (mTabDelegateFactory == null) {
            mTabDelegateFactory = new TabbedModeTabDelegateFactory(this,
                    getAppBrowserControlsVisibilityDelegate(), getShareDelegateSupplier(),
                    mRootUiCoordinator.getEphemeralTabCoordinatorSupplier(),
                    ((TabbedRootUiCoordinator) mRootUiCoordinator)::onContextMenuCopyLink,
                    mRootUiCoordinator.getBottomSheetController(),
                    /* ChromeActivityNativeDelegate */ this, /* isCustomTab= */ false,
                    getBrowserControlsManager(), getFullscreenManager(),
                    /* TabCreatorManager */ this, getTabModelSelectorSupplier(),
                    getCompositorViewHolderSupplier(), getModalDialogManagerSupplier(),
                    this::getSnackbarManager, getBrowserControlsManager(), getActivityTabProvider(),
                    getLifecycleDispatcher(), getWindowAndroid(), getToolbarManager()::getToolbar,
                    mHomeSurfaceTracker, getTabContentManagerSupplier());
        }
        return mTabDelegateFactory;
    }

    @Override
    protected Pair<ChromeTabCreator, ChromeTabCreator> createTabCreators() {
        ChromeTabCreator.OverviewNTPCreator overviewNTPCreator = null;

        if (ReturnToChromeUtil.isStartSurfaceEnabled(this)) {
            overviewNTPCreator = new ChromeTabCreator.OverviewNTPCreator() {
                @Override
                public boolean handleCreateNTPIfNeeded(boolean isNTP, boolean incognito,
                        Tab parentTab, @NewTabPageLaunchOrigin int launchOrigin) {
                    boolean shouldShowStart =
                            showStartSurfaceHomeForNTP(isNTP, incognito, parentTab, launchOrigin);
                    if (shouldShowStart) {
                        mStartSurfaceParentTabSupplier.set(parentTab);
                    }
                    return shouldShowStart;
                }
            };
        }
        return Pair.create(
                new ChromeTabCreator(this, getWindowAndroid(), this::getTabDelegateFactory, false,
                        overviewNTPCreator, AsyncTabParamsManagerSingleton.getInstance(),
                        getTabModelSelectorSupplier(), getCompositorViewHolderSupplier()),
                new ChromeTabCreator(this, getWindowAndroid(), this::getTabDelegateFactory, true,
                        overviewNTPCreator, AsyncTabParamsManagerSingleton.getInstance(),
                        getTabModelSelectorSupplier(), getCompositorViewHolderSupplier()));
    }

    @Override
    protected void initDeferredStartupForActivity() {
        super.initDeferredStartupForActivity();
        DeferredStartupHandler.getInstance().addDeferredTask(() -> {
            if (isActivityFinishingOrDestroyed()) return;

            LauncherShortcutActivity.updateIncognitoShortcut(ChromeTabbedActivity.this);

            ChromeSurveyController.initialize(mTabModelSelector, getLifecycleDispatcher(),
                    ChromeTabbedActivity.this, MessageDispatcherProvider.from(getWindowAndroid()));

            if (mStartSurfaceSupplier.get() != null) {
                // The start surface is not the layout shown on startup, so wait until it is shown
                // before notifying the start surface that is was.
                // TODO(1292661): We should allow the start surface to be the layout that the
                //                browser starts on to avoid logic like this.
                // TODO(1315676): Clean up the check of LayoutType.TAB_SWITCHER once the refactoring
                //                is done. This is because only Start surface is allowed to shown on
                //                startup, not the Grid Tab switcher.
                boolean isStartSurfaceLayoutShown = false;
                if (isStartSurfaceRefactorEnabled()) {
                    isStartSurfaceLayoutShown =
                            getLayoutManager().getActiveLayoutType() == LayoutType.START_SURFACE
                            || getLayoutManager().getNextLayoutType() != LayoutType.START_SURFACE;
                } else {
                    isStartSurfaceLayoutShown =
                            getLayoutManager().getActiveLayoutType() == LayoutType.TAB_SWITCHER
                            || getLayoutManager().getNextLayoutType() != LayoutType.TAB_SWITCHER;
                }
                if (isStartSurfaceLayoutShown) {
                    mStartSurfaceSupplier.get().onOverviewShownAtLaunch(
                            mOverviewShownOnStart, getOnCreateTimestampMs());
                } else if (getLayoutManager().getNextLayoutType() == LayoutType.TAB_SWITCHER
                        || getLayoutManager().getNextLayoutType() == LayoutType.START_SURFACE) {
                    getLayoutManager().addObserver(new LayoutStateProvider.LayoutStateObserver() {
                        @Override
                        public void onStartedShowing(int layoutType) {
                            if (layoutType != LayoutType.TAB_SWITCHER
                                    && layoutType != LayoutType.START_SURFACE) {
                                return;
                            }

                            mStartSurfaceSupplier.get().onOverviewShownAtLaunch(
                                    mOverviewShownOnStart, getOnCreateTimestampMs());

                            getLayoutManager().removeObserver(this);
                        }
                    });
                }
            }
        });
    }

    @Override
    protected void recordIntentToCreationTime(long timeMs) {
        super.recordIntentToCreationTime(timeMs);
        RecordHistogram.recordCustomTimesHistogram("MobileStartup.IntentToCreationTime.TabbedMode",
                timeMs, 1, DateUtils.SECOND_IN_MILLIS * 30, 50);
    }

    @Override
    protected boolean isStartedUpCorrectly(Intent intent) {
        mWindowId = 0;
        Bundle savedInstanceState = getSavedInstanceState();
        int windowId = getExtraWindowIdFromIntent(intent);
        if (savedInstanceState != null && savedInstanceState.containsKey(WINDOW_INDEX)) {
            // Activity is recreated after destruction. |windowId| must not be valid in this case.
            assert windowId == INVALID_WINDOW_ID;
            mWindowId = savedInstanceState.getInt(WINDOW_INDEX, 0);
        } else if (mMultiInstanceManager != null) {
            // |allocInstanceId| doesn't do any disk I/O that would add a long-running task
            // to pre-inflation startup.
            boolean preferNew = getExtraPreferNewFromIntent(intent);
            mWindowId = mMultiInstanceManager.allocInstanceId(
                    windowId, ApplicationStatus.getTaskId(this), preferNew);
        }
        if (mWindowId == INVALID_WINDOW_ID) {
            Log.i(TAG, "Window ID not allocated. Finishing the activity");
            Toast.makeText(this, R.string.max_number_of_windows, Toast.LENGTH_LONG).show();
            recordMaxWindowLimitExceededHistogram(/*limitExceeded=*/true);
            return false;
        }

        if (mMultiInstanceManager != null
                && !mMultiInstanceManager.isStartedUpCorrectly(ApplicationStatus.getTaskId(this))) {
            return false;
        }
        recordMaxWindowLimitExceededHistogram(/*limitExceeded=*/false);

        return super.isStartedUpCorrectly(intent);
    }

    private void recordMaxWindowLimitExceededHistogram(boolean limitExceeded) {
        RecordHistogram.recordBooleanHistogram(
                "Android.MultiInstance.MaxWindowLimitExceeded", limitExceeded);
    }

    private static int getExtraWindowIdFromIntent(Intent intent) {
        int windowId = IntentUtils.safeGetIntExtra(
                intent, IntentHandler.EXTRA_WINDOW_ID, INVALID_WINDOW_ID);
        return IntentUtils.isTrustedIntentFromSelf(intent) ? windowId : INVALID_WINDOW_ID;
    }

    private static boolean getExtraPreferNewFromIntent(Intent intent) {
        return IntentUtils.safeGetBooleanExtra(intent, IntentHandler.EXTRA_PREFER_NEW, false);
    }

    @Override
    public void terminateIncognitoSession() {
        getTabModelSelector().getModel(true).closeAllTabs();
    }

    @Override
    public boolean onMenuOrKeyboardAction(final int id, boolean fromMenu) {
        final Tab currentTab = getActivityTab();
        boolean currentTabIsNtp = isTabNtp(currentTab);
        if (id == R.id.new_tab_menu_id) {
            if (!mTabModelSelector.isTabStateInitialized()) return false;

            getTabModelSelector().getModel(false).commitAllTabClosures();
            RecordUserAction.record("MobileMenuNewTab");
            RecordUserAction.record("MobileNewTabOpened");
            reportNewTabShortcutUsed(false);
            if (fromMenu) RecordUserAction.record("MobileMenuNewTab.AppMenu");

            getTabCreator(false).launchNTP();

            mLocaleManager.showSearchEnginePromoIfNeeded(this, null);
        } else if (id == R.id.new_incognito_tab_menu_id) {
            if (IncognitoUtils.isIncognitoModeEnabled()) {
                if (!mTabModelSelector.isTabStateInitialized()) return false;

                getTabModelSelector().getModel(false).commitAllTabClosures();
                // This action must be recorded before opening the incognito tab since UMA actions
                // are dropped when an incognito tab is open.
                RecordUserAction.record("MobileMenuNewIncognitoTab");
                RecordUserAction.record("MobileNewTabOpened");
                reportNewTabShortcutUsed(true);
                if (fromMenu) RecordUserAction.record("MobileMenuNewIncognitoTab.AppMenu");
                getTabCreator(true).launchNTP();
                Tracker tracker =
                        TrackerFactory.getTrackerForProfile(Profile.getLastUsedRegularProfile());
                tracker.notifyEvent(EventConstants.APP_MENU_NEW_INCOGNITO_TAB_CLICKED);
            }
        } else if (id == R.id.all_bookmarks_menu_id) {
            // Note that 'currentTab' could be null in overview mode when start surface is
            // enabled.
            getCompositorViewHolderSupplier().get().hideKeyboard(() -> {
                BookmarkUtils.showBookmarkManager(
                        ChromeTabbedActivity.this, getCurrentTabModel().isIncognito());
            });
            if (currentTabIsNtp) {
                NewTabPageUma.recordAction(NewTabPageUma.ACTION_OPENED_BOOKMARKS_MANAGER);
            }

            @BrowserProfileType
            int type = getCurrentTabModel().isIncognito() ? BrowserProfileType.INCOGNITO
                                                          : BrowserProfileType.REGULAR;
            RecordHistogram.recordEnumeratedHistogram(
                    "Bookmarks.OpenBookmarkManager.PerProfileType", type,
                    BrowserProfileType.MAX_VALUE + 1);

            RecordUserAction.record("MobileMenuAllBookmarks");
        } else if (id == R.id.recent_tabs_menu_id) {
            LoadUrlParams params =
                    new LoadUrlParams(UrlConstants.RECENT_TABS_URL, PageTransition.AUTO_BOOKMARK);
            boolean isInOverviewMode = isInOverviewMode();
            if (isInOverviewMode && !isTablet() && ReturnToChromeUtil.isStartSurfaceEnabled(this)) {
                // When tapping the "Recent tabs" menu item from the overview page (Start surface or
                // GTS), we will create the tab with the launch type FROM_START_SURFACE. Thus, if
                // the back button is tapped on this "Recent tabs" page, it can go back to the
                // overview page.
                ReturnToChromeUtil.handleLoadUrlFromStartSurface(
                        params, getCurrentTabModel().isIncognito(), null);
            } else if (currentTab != null) {
                currentTab.loadUrl(params);
            } else {
                getTabCreator(getCurrentTabModel().isIncognito())
                        .createNewTab(params, TabLaunchType.FROM_CHROME_UI, null);
            }
            if (isInOverviewMode) {
                mLayoutManager.showLayout(LayoutType.BROWSING, true);
            }

            if (currentTabIsNtp) {
                NewTabPageUma.recordAction(NewTabPageUma.ACTION_OPENED_RECENT_TABS_MANAGER);
            }
            RecordUserAction.record("MobileMenuRecentTabs");
        } else if (id == R.id.close_tab) {
            getCurrentTabModel().closeTab(currentTab, true, false, true);
            RecordUserAction.record("MobileTabClosed");
        } else if (id == R.id.close_all_tabs_menu_id) {
            // Close both incognito and normal tabs.
            CloseAllTabsDialog.show(this, getModalDialogManagerSupplier(),
                    getTabModelSelectorSupplier().get(),
                    () -> getTabModelSelector().closeAllTabs());
            RecordUserAction.record("MobileMenuCloseAllTabs");
        } else if (id == R.id.close_all_incognito_tabs_menu_id) {
            // Close only incognito tabs
            CloseAllTabsDialog.show(this, getModalDialogManagerSupplier(),
                    getTabModelSelectorSupplier().get(),
                    () -> getTabModelSelector().getModel(true).closeAllTabs());
            RecordUserAction.record("MobileMenuCloseAllIncognitoTabs");
        } else if (id == R.id.focus_url_bar) {
            boolean isUrlBarVisible =
                    !isInOverviewMode() && (!isTablet() || getCurrentTabModel().getCount() != 0);
            if (isUrlBarVisible) {
                getToolbarManager().setUrlBarFocus(
                        true, OmniboxFocusReason.MENU_OR_KEYBOARD_ACTION);
            }
        } else if (id == R.id.downloads_menu_id) {
            OTRProfileID otrProfileID = null;
            if (currentTab != null && currentTab.getWebContents() != null) {
                Profile profile = Profile.fromWebContents(currentTab.getWebContents());
                otrProfileID = profile != null ? profile.getOTRProfileID() : null;
            }
            DownloadUtils.showDownloadManager(
                    this, currentTab, otrProfileID, DownloadOpenSource.MENU);
            if (currentTabIsNtp) {
                NewTabPageUma.recordAction(NewTabPageUma.ACTION_OPENED_DOWNLOADS_MANAGER);
            }
            RecordUserAction.record("MobileMenuDownloadManager");
        } else if (id == R.id.open_recently_closed_tab) {
            TabModel currentModel = mTabModelSelector.getCurrentModel();
            if (!currentModel.isIncognito()) currentModel.openMostRecentlyClosedEntry();
            RecordUserAction.record("MobileTabClosedUndoShortCut");
        } else if (id == R.id.quick_delete_menu_id
                && QuickDeleteController.isQuickDeleteEnabled()) {
            assert !mTabModelSelector.getCurrentModel().isIncognito()
                : "Quick delete is not supported in Incognito.";

            if (getLayoutManager().getActiveLayoutType() == LayoutType.TAB_SWITCHER) {
                QuickDeleteMetricsDelegate.recordHistogram(
                        QuickDeleteMetricsDelegate.QuickDeleteAction
                                .TAB_SWITCHER_MENU_ITEM_CLICKED);
            } else {
                QuickDeleteMetricsDelegate.recordHistogram(
                        QuickDeleteMetricsDelegate.QuickDeleteAction.MENU_ITEM_CLICKED);
            }

            new QuickDeleteController(this, new QuickDeleteDelegateImpl(), getModalDialogManager(),
                    getSnackbarManager(), getLayoutManager(), mTabModelSelector);
        } else {
            return super.onMenuOrKeyboardAction(id, fromMenu);
        }
        return true;
    }

    private boolean isTabNtp(Tab tab) {
        return tab != null && UrlUtilities.isNTPUrl(tab.getUrl());
    }

    private boolean isTabRegularNtp(Tab tab) {
        return isTabNtp(tab) && !tab.isIncognito();
    }

    private void onOmniboxFocusChanged(boolean hasFocus) {
        getTabModalLifetimeHandler().onOmniboxFocusChanged(hasFocus);
    }

    private void recordLauncherShortcutAction(boolean isIncognito) {
        if (isIncognito) {
            RecordUserAction.record("Android.LauncherShortcut.NewIncognitoTab");
        } else {
            RecordUserAction.record("Android.LauncherShortcut.NewTab");
        }
    }

    @Override
    public boolean handleBackPressed() {
        // Back press event should be handled through the back press handler.
        assert !BackPressManager.isEnabled() : "Incorrect way of handling back press.";
        if (!mUIWithNativeInitialized) {
            RecordUserAction.record("SystemBackBeforeUINativeInitialized");
            return false;
        }

        // This only intercepts back press 1. on T+ 2. back press refactor is disabled
        // 3. predictive back gesture is opted in.
        if (BuildInfo.isAtLeastT() && getToolbarManager() != null
                && getToolbarManager().unfocusUrlBarOnBackPress()) {
            BackPressManager.record(BackPressHandler.Type.LOCATION_BAR);
            return true;
        }

        if (getTabModalLifetimeHandler().onBackPressed()) {
            BackPressManager.record(BackPressHandler.Type.TAB_MODAL_HANDLER);
            return true;
        }

        // crbug.com/1416719: back press on start surface should close the app.
        final boolean isStartSurfaceHomepageShowing =
                mStartSurfaceSupplier.hasValue() && mStartSurfaceSupplier.get().isHomepageShown();
        final Tab activityTab = BackPressManager.shouldUseActivityTabProvider()
                ? getActivityTabProvider().get()
                : getActivityTab();
        final Tab currentTab = isStartSurfaceHomepageShowing ? null : activityTab;
        // Handles the case of Start surface homepage is showing.
        if (currentTab == null) {
            minimizeAppAndCloseTabOnBackPress(null);
            return true;
        }

        final WebContents webContents = currentTab.getWebContents();
        if (webContents != null) {
            RenderFrameHost focusedFrame = webContents.getFocusedFrame();
            if (focusedFrame != null && focusedFrame.signalCloseWatcherIfActive()) {
                BackPressManager.record(BackPressHandler.Type.CLOSE_WATCHER);
                return true;
            }
        }

        if (getToolbarManager().back()) {
            BackPressManager.record(BackPressHandler.Type.TAB_HISTORY);
            return true;
        }

        // Handles the case of showing Tab switcher and will return to the Start surface.
        if (ReturnToChromeUtil.shouldHandleTabSwitcherShown(
                    mIsHandleTabSwitcherShownEnabled, mLayoutStateProviderSupplier.get())) {
            // Passes true since Tab switcher is showing and we should handle this case to return to
            // the Start surface.
            returnToOverviewModeOnBackPressed(true);
            BackPressManager.record(BackPressHandler.Type.TAB_RETURN_TO_CHROME_START_SURFACE);
            return true;
        }

        // If we aren't in the overview mode, we handle the Tab that is opened from Start Surface.
        if (!isInOverviewMode() && !isTablet()
                && ReturnToChromeUtil.isTabFromStartSurface(currentTab)) {
            // Passes false since Tab switcher isn't showing.
            returnToOverviewModeOnBackPressed(false);
            BackPressManager.record(BackPressHandler.Type.TAB_RETURN_TO_CHROME_START_SURFACE);
            return true;
        }

        final @TabLaunchType int type = currentTab.getLaunchType();

        if (type == TabLaunchType.FROM_READING_LIST) {
            assert !isTablet() : "Not expecting to see FROM_READING_LIST on tablets";
            ReadingListUtils.showReadingList(currentTab.isIncognito());
            BackPressManager.record(BackPressHandler.Type.SHOW_READING_LIST);
            if (webContents != null) webContents.dispatchBeforeUnload(false);
            return true;
        }

        // At this point we know either the tab will close or the app will minimize.
        NativePage nativePage = currentTab.getNativePage();
        if (nativePage != null) {
            nativePage.notifyHidingWithBack();
        }

        if (minimizeAppAndCloseTabOnBackPress(currentTab)) return true;

        assert false : "The back button should have already been handled by this point";
        return false;
    }

    private boolean minimizeAppAndCloseTabOnBackPress(@Nullable Tab currentTab) {
        if (currentTab == null) {
            BackPressManager.record(BackPressHandler.Type.MINIMIZE_APP_AND_CLOSE_TAB);
            MinimizeAppAndCloseTabBackPressHandler.record(MinimizeAppAndCloseTabType.MINIMIZE_APP);
            assertOnLastBackPress();
            moveTaskToBack(true);
            return true;
        }
        // TAB history handler has a higher priority and should navigate page back before
        // minimizing app and closing tab.
        assert !currentTab.canGoBack()
            : "Tab should be navigated back before closing or exiting app";
        final boolean shouldCloseTab = backShouldCloseTab(currentTab);
        final WebContents webContents = currentTab.getWebContents();

        // Minimize the app if either:
        // - we decided not to close the tab
        // - we decided to close the tab, but it was opened by an external app, so we will go
        //   exit Chrome on top of closing the tab
        final boolean minimizeApp =
                !shouldCloseTab || TabAssociatedApp.isOpenedFromExternalApp(currentTab);

        BackPressManager.record(BackPressHandler.Type.MINIMIZE_APP_AND_CLOSE_TAB);
        assertOnLastBackPress();

        if (minimizeApp) {
            if (shouldCloseTab) {
                MinimizeAppAndCloseTabBackPressHandler.record(
                        MinimizeAppAndCloseTabType.MINIMIZE_APP_AND_CLOSE_TAB);
                sendToBackground(currentTab);
            } else {
                MinimizeAppAndCloseTabBackPressHandler.record(
                        MinimizeAppAndCloseTabType.MINIMIZE_APP);
                sendToBackground(null);
            }
            return true;
        } else if (shouldCloseTab) {
            MinimizeAppAndCloseTabBackPressHandler.record(MinimizeAppAndCloseTabType.CLOSE_TAB);
            if (webContents != null) webContents.dispatchBeforeUnload(false);
            return true;
        }
        return false;
    }

    private void assertOnLastBackPress() {
        final boolean isStartSurfaceHomepageShowing =
                mStartSurfaceSupplier.hasValue() && mStartSurfaceSupplier.get().isHomepageShown();
        final Tab currentTab = isStartSurfaceHomepageShowing ? null : getActivityTab();
        var activityTab = getActivityTabProvider().get();
        MinimizeAppAndCloseTabBackPressHandler.assertOnLastBackPress(currentTab, activityTab,
                this::backShouldCloseTab, mLayoutStateProviderSupplier,
                isActivityFinishingOrDestroyed());
    }

    private void initializeBackPressHandlers() {
        mBackPressManager.setHasSystemBackArm(true);
        if (mReturnToChromeBackPressHandler == null && !isTablet()) {
            mIsHandleTabSwitcherShownEnabled = isStartSurfaceRefactorEnabled()
                    && ReturnToChromeUtil.isStartSurfaceEnabled(this);

            mReturnToChromeBackPressHandler = new ReturnToChromeBackPressHandler(
                    getActivityTabProvider(), this::returnToOverviewModeOnBackPressed,
                    this::getActivityTab, mLayoutStateProviderSupplier,
                    mBackPressManager::getLastPressMs, mIsHandleTabSwitcherShownEnabled);
            mBackPressManager.addHandler(mReturnToChromeBackPressHandler,
                    BackPressHandler.Type.TAB_RETURN_TO_CHROME_START_SURFACE);
        }
        if (mReadingListBackPressHandler == null && !isTablet()) {
            mReadingListBackPressHandler =
                    new ReadingListBackPressHandler(getActivityTabProvider());
            mBackPressManager.addHandler(
                    mReadingListBackPressHandler, BackPressHandler.Type.SHOW_READING_LIST);
        }
        if (mMinimizeAppAndCloseTabBackPressHandler == null) {
            mMinimizeAppAndCloseTabBackPressHandler = new MinimizeAppAndCloseTabBackPressHandler(
                    getActivityTabProvider(), this::backShouldCloseTab, this::sendToBackground,
                    this::assertOnLastBackPress, mBackPressManager::getLastPressMs);
            mBackPressManager.addHandler(mMinimizeAppAndCloseTabBackPressHandler,
                    BackPressHandler.Type.MINIMIZE_APP_AND_CLOSE_TAB);
        }
    }

    /**
     * [true]: Reached the bottom of the back stack on a tab the user did not explicitly
     * create (i.e. it was created by an external app or opening a link in background, etc).
     * [false]: Reached the bottom of the back stack on a tab that the user explicitly
     * created (e.g. selecting "new tab" from menu).
     *
     * @return Whether pressing the back button on the provided Tab should close the Tab.
     */
    @Override
    public boolean backShouldCloseTab(Tab tab) {
        if (!tab.isInitialized() || tab.isClosing() || tab.isDestroyed()) {
            return false;
        }
        @TabLaunchType
        int type = tab.getLaunchType();

        return type == TabLaunchType.FROM_LINK || type == TabLaunchType.FROM_EXTERNAL_APP
                || type == TabLaunchType.FROM_READING_LIST
                || type == TabLaunchType.FROM_LONGPRESS_FOREGROUND
                || type == TabLaunchType.FROM_LONGPRESS_INCOGNITO
                || type == TabLaunchType.FROM_LONGPRESS_BACKGROUND
                || type == TabLaunchType.FROM_LONGPRESS_BACKGROUND_IN_GROUP
                || type == TabLaunchType.FROM_RECENT_TABS
                || (type == TabLaunchType.FROM_RESTORE
                        && CriticalPersistedTabData.from(tab).getParentId() != Tab.INVALID_TAB_ID);
    }

    /**
     * Sends this Activity to the background.
     *
     * @param tabToClose Tab that will be closed once the app is not visible.
     */
    private void sendToBackground(@Nullable final Tab tabToClose) {
        Log.i(TAG, "sendToBackground(): " + tabToClose);
        moveTaskToBack(true);
        if (tabToClose != null) {
            // In the case of closing a tab upon minimization, don't allow the close action to
            // happen until after our app is minimized to make sure we don't get a brief glimpse of
            // the newly active tab before we exit Chrome.
            //
            // If the runnable doesn't run before the Activity dies, Chrome won't crash but the tab
            // won't be closed (crbug.com/587565).
            mHandler.postDelayed(() -> {
                if (mTabModelSelector == null || tabToClose.isClosing()
                        || tabToClose.isDestroyed()) {
                    return;
                }

                final TabModel currentModel = mTabModelSelector.getCurrentModel();
                final TabModel tabToCloseModel =
                        mTabModelSelector.getModel(tabToClose.isIncognito());
                if (currentModel != tabToCloseModel) {
                    // This seems improbable; however, crbug/1463397 suggests otherwise. If this
                    // happens, remain on the current tab and close the tab in the other model.
                    tabToCloseModel.closeTab(tabToClose, null, false, true, false);
                    return;
                }

                Tab nextTab =
                        currentModel.getNextTabIfClosed(tabToClose.getId(), /*uponExit=*/true);
                currentModel.closeTab(tabToClose, nextTab, false, true, false);

                // If there is no next tab to open, enter overview mode.
                if (nextTab == null && !isActivityFinishingOrDestroyed()) {
                    showOverview(StartSurfaceState.SHOWING_START);
                }
            }, CLOSE_TAB_ON_MINIMIZE_DELAY_MS);
        }
    }

    @Override
    public boolean moveTaskToBack(boolean nonRoot) {
        try {
            return super.moveTaskToBack(nonRoot);
        } catch (NullPointerException e) {
            // Work around framework bug described in https://crbug.com/817567.
            finish();
            return true;
        }
    }

    /**
     * Launch a URL from an intent.
     * @param loadUrlParams Parameters specifying the url to load.
     * @param externalAppId External app id.
     * @param forceNewTab   Whether to force the URL to be launched in a new tab or to fall
     *                      back to the default behavior for making that determination.
     * @param intent        The original intent.
     */
    private Tab launchIntent(
            LoadUrlParams loadUrlParams, String externalAppId, boolean forceNewTab, Intent intent) {
        if (mUIWithNativeInitialized && !UrlUtilities.isNTPUrl(loadUrlParams.getUrl())) {
            getLayoutManager().showLayout(LayoutType.BROWSING, false);
            getToolbarManager().finishAnimations();
        }
        if (IntentHandler.wasIntentSenderChrome(intent)) {
            // If the intent was launched by chrome, open the new tab in the appropriate model.
            boolean isIncognito = IntentUtils.safeGetBooleanExtra(
                    intent, IntentHandler.EXTRA_OPEN_NEW_INCOGNITO_TAB, false);
            @TabLaunchType
            Integer launchType = IntentHandler.getTabLaunchType(intent);
            if (launchType == null) {
                if (IntentUtils.safeGetBooleanExtra(
                            intent, IntentHandler.EXTRA_INVOKED_FROM_SHORTCUT, false)) {
                    launchType = TabLaunchType.FROM_LAUNCHER_SHORTCUT;
                } else if (IntentUtils.safeGetBooleanExtra(
                                   intent, IntentHandler.EXTRA_INVOKED_FROM_APP_WIDGET, false)) {
                    launchType = TabLaunchType.FROM_APP_WIDGET;
                } else if (IncognitoTabLauncher.didCreateIntent(intent)) {
                    launchType = TabLaunchType.FROM_LAUNCH_NEW_INCOGNITO_TAB;
                } else {
                    // Using FROM_LINK ensures the tab is parented to the current tab, which allows
                    // the back button to close these tabs and restore selection to the previous
                    // tab.
                    launchType = TabLaunchType.FROM_LINK;
                }
            }

            ChromeTabCreator tabCreator = getTabCreator(isIncognito);
            Tab firstTab = tabCreator.createNewTab(loadUrlParams, launchType, null, intent);

            List<String> additionalUrls = IntentUtils.safeGetSerializableExtra(
                    intent, IntentHandler.EXTRA_ADDITIONAL_URLS);
            boolean openAdditionalUrlsInTabGroup = IntentUtils.safeGetBooleanExtra(
                    intent, IntentHandler.EXTRA_OPEN_ADDITIONAL_URLS_IN_TAB_GROUP, false);
            if (additionalUrls != null) {
                final Tab parent = openAdditionalUrlsInTabGroup ? firstTab : null;
                @TabLaunchType
                int additionalUrlLaunchType = openAdditionalUrlsInTabGroup
                        ? TabLaunchType.FROM_LONGPRESS_BACKGROUND_IN_GROUP
                        : TabLaunchType.FROM_RESTORE;
                for (int i = 0; i < additionalUrls.size(); i++) {
                    String url = additionalUrls.get(i);
                    LoadUrlParams copy = LoadUrlParams.copy(loadUrlParams);
                    copy.setUrl(url);
                    tabCreator.createNewTab(copy, additionalUrlLaunchType, parent);
                }
            }
            return firstTab;
        }

        // Check if the tab is being created from a Reader Mode navigation.
        if (ReaderModeManager.isEnabled() && ReaderModeManager.isReaderModeCreatedIntent(intent)) {
            Bundle extras = intent.getExtras();
            int readerParentId = IntentUtils.safeGetInt(
                    extras, ReaderModeManager.EXTRA_READER_MODE_PARENT, Tab.INVALID_TAB_ID);
            extras.remove(ReaderModeManager.EXTRA_READER_MODE_PARENT);
            // Set the parent tab to the tab that Reader Mode started from.
            if (readerParentId != Tab.INVALID_TAB_ID && mTabModelSelector != null) {
                return getCurrentTabCreator().createNewTab(
                        new LoadUrlParams(loadUrlParams.getUrl(), PageTransition.LINK),
                        TabLaunchType.FROM_LINK, mTabModelSelector.getTabById(readerParentId));
            }
        }

        return getTabCreator(false).launchUrlFromExternalApp(
                loadUrlParams, externalAppId, forceNewTab, intent);
    }

    // TODO(crbug.com/1315676): Once the refactor is finished, remove all StartSurfaceState codes.
    private void showOverview(@StartSurfaceState int state) {
        showOverview(state, NewTabPageLaunchOrigin.UNKNOWN);
    }

    // TODO(crbug.com/1115757): After crrev.com/c/2315823, Overview state and Startsurface state are
    // two different things, we actual can split this into two methods: showOverview() and
    // showStartSurface(state). Let's do some auditing and clean up before perform the actual split.
    private void showOverview(
            @StartSurfaceState int state, @NewTabPageLaunchOrigin int launchOrigin) {
        // TODO(crbug.com/1315676): Remove all StartSurfaceState relevant code.
        assert (state == StartSurfaceState.SHOWING_TABSWITCHER
                || state == StartSurfaceState.SHOWING_HOMEPAGE
                || state == StartSurfaceState.SHOWING_PREVIOUS
                || state == StartSurfaceState.SHOWING_START);
        if (mIsAccessibilityTabSwitcherEnabled != null && mIsAccessibilityTabSwitcherEnabled
                && mLayoutManager != null) {
            // TODO(1200727): This is a temporary fix that should be removed once grid tab switcher
            //                is completely launched. The "start surface" is now created regardless
            //                of the state of accessibility, so we check that mode first and try
            //                showing the overview list before going to the start surface.
            mLayoutManager.showLayout(LayoutType.TAB_SWITCHER, false);
        } else if (mStartSurfaceSupplier.get() != null) {
            if (!isStartSurfaceRefactorEnabled()) {
                if (ReturnToChromeUtil.shouldHideStartSurfaceWithAccessibilityOn(this)
                        || !HomepageManager.isHomepageEnabled()) {
                    state = StartSurfaceState.SHOWING_TABSWITCHER;
                }
                mStartSurfaceSupplier.get().setStartSurfaceState(state, launchOrigin);
            } else {
                mStartSurfaceSupplier.get().setLaunchOrigin(launchOrigin);
            }
        }

        if (mLayoutManager == null) return;

        if (isInOverviewMode()) {
            if (didFinishNativeInitialization()) {
                getCompositorViewHolderSupplier().get().hideKeyboard(() -> {});
            }
            if (!isStartSurfaceRefactorEnabled()) return;
        }

        Tab currentTab = getActivityTab();
        @LayoutType
        int layoutTypeToShow = LayoutType.TAB_SWITCHER;
        if (isStartSurfaceRefactorEnabled() && ReturnToChromeUtil.isStartSurfaceEnabled(this)
                && state != StartSurfaceState.SHOWING_TABSWITCHER
                && !getTabModelSelector().isIncognitoSelected()) {
            layoutTypeToShow = LayoutType.START_SURFACE;
            if (state == StartSurfaceState.SHOWING_PREVIOUS) {
                ReturnToChromeUtil.recordBackNavigationToStart("FromTab");
            } else {
                // Resets the scroll position when Start is showing not via back operations.
                mStartSurfaceSupplier.get().resetScrollPosition();
            }
        }

        ReturnToChromeUtil.recordStartSurfaceState(state);

        // If we don't have a current tab, show the overview mode.
        if (currentTab == null) {
            mLayoutManager.showLayout(layoutTypeToShow, false);
        } else {
            final int layoutTypeToShowFinal = layoutTypeToShow;
            getCompositorViewHolderSupplier().get().hideKeyboard(
                    () -> mLayoutManager.showLayout(layoutTypeToShowFinal, true));
        }
    }

    private void hideOverview() {
        assert (isInOverviewMode());
        if (getCurrentTabModel().getCount() != 0) {
            // Don't hide overview if current tab stack is empty()
            mLayoutManager.showLayout(LayoutType.BROWSING, false);
        }
    }

    /**
     * @return Whether opening a new tab is handled by the Start surface.
     */
    private boolean showStartSurfaceHomeForNTP(boolean isNTP, boolean incognito, Tab parentTab,
            @NewTabPageLaunchOrigin int launchOrigin) {
        if (!isNTP
                || !ReturnToChromeUtil.shouldShowStartSurfaceHomeAsNewTab(
                        this, incognito, isTablet())) {
            return false;
        }

        getTabModelSelector().selectModel(incognito);
        if (isInstantStartEnabled()
                || (getTabModelSelector().isTabStateInitialized() && isLayoutManagerCreated())) {
            showOverview(StartSurfaceState.SHOWING_HOMEPAGE, launchOrigin);
        }
        return true;
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity.onSaveInstanceState")) {
            super.onSaveInstanceState(outState);
            CipherFactory.getInstance().saveToBundle(outState);
            outState.putInt(
                    WINDOW_INDEX, TabWindowManagerSingleton.getInstance().getIndexForWindow(this));
            Boolean is_incognito = getCurrentTabModel().isIncognito();
            outState.putBoolean(IS_INCOGNITO_SELECTED, is_incognito);
            // If it's Incognito and native is initialized and profile exists, serialize duration
            // service state.
            if (is_incognito && ProfileManager.isInitialized()) {
                AndroidSessionDurationsServiceState.serializeFromNative(
                        outState, getCurrentTabModel().getProfile());
            }
        }
    }

    @Override
    public void onDestroyInternal() {
        if (mReturnToChromeBackPressHandler != null) {
            mReturnToChromeBackPressHandler.destroy();
            mReturnToChromeBackPressHandler = null;
        }

        if (mReadingListBackPressHandler != null) {
            mReadingListBackPressHandler.destroy();
            mReadingListBackPressHandler = null;
        }
        if (mMinimizeAppAndCloseTabBackPressHandler != null) {
            mMinimizeAppAndCloseTabBackPressHandler.destroy();
            mMinimizeAppAndCloseTabBackPressHandler = null;
        }

        if (mCallbackController != null) {
            mCallbackController.destroy();
            mCallbackController = null;
        }

        if (mTabModelSelectorTabObserver != null) {
            mTabModelSelectorTabObserver.destroy();
            mTabModelSelectorTabObserver = null;
        }

        if (mHistoricalTabModelObserver != null) mHistoricalTabModelObserver.destroy();

        if (mTabModelObserver != null) mTabModelObserver.destroy();

        if (mUndoBarPopupController != null) {
            mUndoBarPopupController.destroy();
            mUndoBarPopupController = null;
        }

        if (mAppIndexingUtil != null) {
            mAppIndexingUtil.destroy();
            mAppIndexingUtil = null;
        }

        if (mStartSurfaceSupplier.get() != null) {
            mStartSurfaceSupplier.get().destroy();
        }

        if (mStartupPaintPreviewHelperSupplier != null) {
            mStartupPaintPreviewHelperSupplier.destroy();
        }

        IncognitoTabHostRegistry.getInstance().unregister(mIncognitoTabHost);

        TabObscuringHandler tabObscuringHandler = getTabObscuringHandler();
        if (tabObscuringHandler != null) {
            getTabObscuringHandler().removeObserver(mCompositorViewHolder);
            getTabObscuringHandler().removeObserver(mOverviewListLayout);
        }

        if (isTablet()) ChromeAccessibilityUtil.get().removeObserver(mCompositorViewHolder);
        ChromeAccessibilityUtil.get().removeObserver(this);
        ChromeAccessibilityUtil.get().removeObserver(mLayoutManager);

        if (mTabDelegateFactory != null) mTabDelegateFactory.destroy();

        mAppLaunchDrawBlocker.destroy();

        if (mAuxiliarySearchController != null) {
            mAuxiliarySearchController.destroy();
        }

        super.onDestroyInternal();
    }

    @Override
    protected void destroyTabModels() {
        if (mTabModelOrchestrator != null) {
            mTabModelOrchestrator.destroy();
        }
    }

    @Override
    public void onTrimMemory(int level) {
        super.onTrimMemory(level);
        if (ChromeApplicationImpl.isSevereMemorySignal(level)) {
            NativePageAssassin.getInstance().freezeAllHiddenPages();
        }
    }

    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        Boolean result = KeyboardShortcuts.dispatchKeyEvent(event, mUIWithNativeInitialized,
                getFullscreenManager(), /* menuOrKeyboardActionController= */ this);
        return result != null ? result : super.dispatchKeyEvent(event);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (!mUIWithNativeInitialized) {
            return super.onKeyDown(keyCode, event);
        }
        // Detecting a long press of the back button via onLongPress is broken in Android N.
        // To work around this, use a postDelayed, which is supported in all versions.
        if (keyCode == KeyEvent.KEYCODE_BACK && !isTablet()
                && !getFullscreenManager().getPersistentFullscreenMode()) {
            if (mShowHistoryRunnable == null) mShowHistoryRunnable = this::showFullHistorySheet;
            mHandler.postDelayed(mShowHistoryRunnable, ViewConfiguration.getLongPressTimeout());
            return super.onKeyDown(keyCode, event);
        }
        boolean isCurrentTabVisible =
                !isInOverviewMode() && (!isTablet() || getCurrentTabModel().getCount() != 0);
        return KeyboardShortcuts.onKeyDown(event, isCurrentTabVisible, true, getTabModelSelector(),
                       /* menuOrKeyboardActionController= */ this, getToolbarManager())
                || super.onKeyDown(keyCode, event);
    }

    private void showFullHistorySheet() {
        ((TabbedRootUiCoordinator) mRootUiCoordinator).showFullHistorySheet();
    }

    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK && !isTablet()) {
            mHandler.removeCallbacks(mShowHistoryRunnable);
            mShowHistoryRunnable = null;
            if (event.getEventTime() - event.getDownTime()
                            >= ViewConfiguration.getLongPressTimeout()
                    && NavigationSheet.isInstanceShowing(
                            mRootUiCoordinator.getBottomSheetController())) {
                // If tab history popup is showing, do not process the keyUp event
                // which will dismiss it immediately.
                return true;
            }
        }
        return super.onKeyUp(keyCode, event);
    }

    public boolean hasPendingNavigationRunnableForTesting() {
        ThreadUtils.assertOnUiThread();
        return mShowHistoryRunnable != null;
    }

    @Override
    public void onProvideKeyboardShortcuts(
            List<KeyboardShortcutGroup> data, Menu menu, int deviceId) {
        data.addAll(KeyboardShortcuts.createShortcutGroup(this));
    }

    @VisibleForTesting
    public View getTabsView() {
        return getCompositorViewHolderSupplier().get();
    }

    @VisibleForTesting
    public LayoutManagerChrome getLayoutManager() {
        return (LayoutManagerChrome) getCompositorViewHolderSupplier().get().getLayoutManager();
    }

    @VisibleForTesting
    public OneshotSupplier<LayoutStateProvider> getLayoutStateProviderSupplier() {
        return mLayoutStateProviderSupplier;
    }

    @VisibleForTesting
    public Layout getOverviewListLayout() {
        return getLayoutManager().getOverviewListLayout();
    }

    @VisibleForTesting
    public StartSurface getStartSurface() {
        return mStartSurfaceSupplier.get();
    }

    public TabSwitcher getTabSwitcherForTesting() {
        return mTabSwitcherSupplier.get();
    }

    private ComposedBrowserControlsVisibilityDelegate getAppBrowserControlsVisibilityDelegate() {
        return mRootUiCoordinator.getAppBrowserControlsVisibilityDelegate();
    }

    // App Menu related code -----------------------------------------------------------------------

    @Override
    public boolean canShowAppMenu() {
        // The popup menu relies on the model created during the full UI initialization, so do not
        // attempt to show the menu until the UI creation has finished.
        if (!mUIWithNativeInitialized) return false;

        // If the current active tab is showing a tab modal dialog, an app menu shouldn't be shown
        // in any cases, e.g. when a hardware menu button is clicked.
        Tab tab = getActivityTab();
        if (tab != null && ChromeTabModalPresenter.isDialogShowing(tab)) return false;

        return super.canShowAppMenu();
    }

    @Override
    public boolean isInOverviewMode() {
        return mLayoutManager != null
                && (mLayoutManager.isLayoutVisible(LayoutType.TAB_SWITCHER)
                        || mLayoutManager.isLayoutVisible(LayoutType.START_SURFACE));
    }

    @Override
    public boolean shouldShowOverviewPageOnStart(Intent intent) {
        assert mInactivityTracker != null;
        assert getTabModelSelector() != null;
        return ReturnToChromeUtil.shouldShowOverviewPageOnStart(
                this, intent, getTabModelSelector(), mInactivityTracker, isTablet());
    }

    private boolean shouldShowOverviewPageOnStart() {
        return shouldShowOverviewPageOnStart(getIntent());
    }

    @Override
    public void onStart() {
        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity.onStart")) {
            super.onStart();
        }
    }

    @Override
    public void onStop() {
        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity.onStop")) {
            super.onStop();
        }
    }

    @Override
    public void onPause() {
        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity.onPause")) {
            super.onPause();
        }
    }

    @Override
    public void onResume() {
        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity.onResume")) {
            super.onResume();
        }
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        try (TraceEvent e = TraceEvent.scoped("ChromeTabbedActivity.onActivityResult")) {
            super.onActivityResult(requestCode, resultCode, data);
        }
    }

    @Override
    public void performOnConfigurationChanged(Configuration newConfig) {
        try (TraceEvent e =
                        TraceEvent.scoped("ChromeTabbedActivity.performOnConfigurationChanged")) {
            super.performOnConfigurationChanged(newConfig);
        }
    }
    private void returnToOverviewModeOnBackPressed(boolean handleTabSwitcherShown) {
        // When TabSwitcherLayout is shown while TabSwitcherMediator doesn't handle the back
        // operation, it means it should return to the Start surface and is handled here.
        if (ReturnToChromeUtil.mayReturnToStartSurface(handleTabSwitcherShown, mLayoutManager)) {
            return;
        }

        Tab currentTab = getActivityTab();
        assert currentTab != null && !currentTab.canGoBack();

        // If current tab is an incognito one, we need to change tab model to non-incognito for
        // showing non-incognito start surface homepage.
        if (currentTab.isIncognito()) mTabModelSelector.selectModel(/*incognito=*/false);

        if (StartSurfaceUserData.getKeepTab(currentTab)
                || StartSurfaceUserData.isOpenedFromStart(currentTab)) {
            // If the current tab is created from the start surface with the keepTab property,
            // shows the Start surface non-incognito homepage to prevent a loop between the
            // current tab and previous overview mode. Once in the Start surface, it will close
            // Chrome if back button is tapped again.
            showOverview(StartSurfaceState.SHOWING_HOMEPAGE);
            ReturnToChromeUtil.recordBackNavigationToStart("FromTab");
        } else {
            // Otherwise, clicking the back button should go back to the previous overview mode.
            showOverview(StartSurfaceState.SHOWING_PREVIOUS);
        }

        if (currentTab.isClosing()) return;
        // If current tab is incognito, or it shouldn't be kept and it's not from restore, close
        // the tab.
        if (currentTab.isIncognito()
                || (!StartSurfaceUserData.getKeepTab(currentTab)
                        && currentTab.getLaunchType() != TabLaunchType.FROM_RESTORE)) {
            closeTabAfterStartSurfaceLayoutIsShown(currentTab);
        }
    }

    @Override
    protected IntentHandlerDelegate createIntentHandlerDelegate() {
        return new InternalIntentDelegate();
    }

    @Override
    public void onSceneChange(Layout layout) {
        super.onSceneChange(layout);
        if (!layout.shouldDisplayContentOverlay()) mTabModelSelector.onTabsViewShown();
    }

    /**
     * Writes the tab state to disk.
     */
    @VisibleForTesting
    public void saveState() {
        mTabModelOrchestrator.saveState();

        // Save whether the current tab is a search result page into preferences.
        Tab currentStandardTab = TabModelUtils.getCurrentTab(mTabModelSelector.getModel(false));
        SharedPreferencesManager.getInstance().writeBoolean(
                ChromePreferenceKeys.IS_LAST_VISITED_TAB_SRP,
                currentStandardTab != null
                        && UrlUtilitiesJni.get().isGoogleSearchUrl(
                                currentStandardTab.getUrl().getSpec()));
    }

    @Override
    public void onEnterVr() {
        super.onEnterVr();
        mControlContainer.setVisibility(View.INVISIBLE);
        if (mVrBrowserControlsVisibilityDelegate == null) {
            mVrBrowserControlsVisibilityDelegate =
                    new BrowserControlsVisibilityDelegate(BrowserControlsState.BOTH);
            getAppBrowserControlsVisibilityDelegate().addDelegate(
                    mVrBrowserControlsVisibilityDelegate);
        }
        mVrBrowserControlsVisibilityDelegate.set(BrowserControlsState.HIDDEN);
    }

    @Override
    public void onExitVr() {
        super.onExitVr();
        mControlContainer.setVisibility(View.VISIBLE);
        if (mVrBrowserControlsVisibilityDelegate != null) {
            mVrBrowserControlsVisibilityDelegate.set(BrowserControlsState.BOTH);
        }
    }

    /**
     * Reports that a new tab launcher shortcut was selected or an action equivalent to a shortcut
     * was performed.
     * @param isIncognito Whether the shortcut or action created a new incognito tab.
     */
    @RequiresApi(Build.VERSION_CODES.N_MR1)
    private void reportNewTabShortcutUsed(boolean isIncognito) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N_MR1) return;

        ShortcutManager shortcutManager = getSystemService(ShortcutManager.class);
        shortcutManager.reportShortcutUsed(
                isIncognito ? "new-incognito-tab-shortcut" : "new-tab-shortcut");
    }

    public MultiInstanceManager getMultiInstanceMangerForTesting() {
        return mMultiInstanceManager;
    }

    @VisibleForTesting
    public ChromeNextTabPolicySupplier getNextTabPolicySupplier() {
        return (ChromeNextTabPolicySupplier) mNextTabPolicySupplier;
    }

    private void closeTabAfterStartSurfaceLayoutIsShown(Tab currentTab) {
        // Closing tab should be called after StartSurfaceLayout finishes showing.
        getLayoutManager().addObserver(new LayoutStateProvider.LayoutStateObserver() {
            @Override
            public void onFinishedShowing(int layoutType) {
                assert layoutType == LayoutType.TAB_SWITCHER
                        || layoutType == LayoutType.START_SURFACE;
                PostTask.postTask(TaskTraits.UI_DEFAULT, () -> {
                    mTabModelSelector.getModel(currentTab.isIncognito()).closeTab(currentTab);
                });
                getLayoutManager().removeObserver(this);
            }
        });
    }

    /**
     * Returns whether the Start surface refactoring is enabled.
     */
    private boolean isStartSurfaceRefactorEnabled() {
        if (mIsStartSurfaceRefactorEnabled == null) {
            mIsStartSurfaceRefactorEnabled = ReturnToChromeUtil.isStartSurfaceRefactorEnabled(this);
        }
        return mIsStartSurfaceRefactorEnabled;
    }

    /**
     * Returns whether to show a NTP as the home surface at startup on tablet in regular mode.
     */
    private boolean shouldShowNtpHomeSurfaceOnStartup() {
        if (mTabModelSelector.isIncognitoSelected()) return false;

        assert mInactivityTracker != null;
        return ReturnToChromeUtil.shouldShowNtpAsHomeSurfaceAtStartup(isTablet(), getIntent(),
                getSavedInstanceState(), mTabModelSelector, mInactivityTracker);
    }

    /**
     * Returns whether to skip saving non-active Ntps on tablet. Note: if a NTP is the last active
     * Tab, it won't be skipped.
     */
    private boolean skipSavingNonActiveNtps() {
        return StartSurfaceConfiguration.isNtpAsHomeSurfaceEnabled(isTablet());
    }
}
