[Android] Rename TabBase to Tab

chrome/android/java/src/org/chromium/chrome/browser/TabBase.java

Index: chrome/android/java/src/org/chromium/chrome/browser/TabBase.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/TabBase.java b/chrome/android/java/src/org/chromium/chrome/browser/TabBase.java
deleted file mode 100644
index f227bc458474d8e2f19e2ee5d180cf990541c232..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/TabBase.java
+++ /dev/null
@@ -1,964 +0,0 @@
-// Copyright 2012 The Chromium Authors. All rights reserved.
-// 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 android.app.Activity;
-import android.content.Context;
-import android.graphics.Bitmap;
-import android.graphics.Color;
-import android.view.ContextMenu;
-import android.view.View;
-
-import org.chromium.base.CalledByNative;
-import org.chromium.base.ObserverList;
-import org.chromium.chrome.browser.banners.AppBannerManager;
-import org.chromium.chrome.browser.contextmenu.ChromeContextMenuItemDelegate;
-import org.chromium.chrome.browser.contextmenu.ChromeContextMenuPopulator;
-import org.chromium.chrome.browser.contextmenu.ContextMenuParams;
-import org.chromium.chrome.browser.contextmenu.ContextMenuPopulator;
-import org.chromium.chrome.browser.contextmenu.ContextMenuPopulatorWrapper;
-import org.chromium.chrome.browser.contextmenu.EmptyChromeContextMenuItemDelegate;
-import org.chromium.chrome.browser.infobar.AutoLoginProcessor;
-import org.chromium.chrome.browser.infobar.InfoBarContainer;
-import org.chromium.chrome.browser.profiles.Profile;
-import org.chromium.chrome.browser.ui.toolbar.ToolbarModelSecurityLevel;
-import org.chromium.content.browser.ContentView;
-import org.chromium.content.browser.ContentViewClient;
-import org.chromium.content.browser.ContentViewCore;
-import org.chromium.content.browser.NavigationClient;
-import org.chromium.content.browser.NavigationHistory;
-import org.chromium.content.browser.PageInfo;
-import org.chromium.content.browser.WebContentsObserverAndroid;
-import org.chromium.content_public.browser.WebContents;
-import org.chromium.ui.base.Clipboard;
-import org.chromium.ui.base.WindowAndroid;
-
-import java.util.concurrent.atomic.AtomicInteger;
-
-/**
- * The basic Java representation of a tab.  Contains and manages a {@link ContentView}.
- *
- * TabBase provides common functionality for ChromiumTestshell's Tab as well as Chrome on Android's
- * tab. It is intended to be extended either on Java or both Java and C++, with ownership managed
- * by this base class.
- *
- * Extending just Java:
- *  - Just extend the class normally.  Do not override initializeNative().
- * Extending Java and C++:
- *  - Because of the inner-workings of JNI, the subclass is responsible for constructing the native
- *    subclass, which in turn constructs TabAndroid (the native counterpart to TabBase), which in
- *    turn sets the native pointer for TabBase.  For destruction, subclasses in Java must clear
- *    their own native pointer reference, but TabBase#destroy() will handle deleting the native
- *    object.
- */
-public abstract class TabBase implements NavigationClient {
-    public static final int INVALID_TAB_ID = -1;
-
-    /** Used for automatically generating tab ids. */
-    private static final AtomicInteger sIdCounter = new AtomicInteger();
-
-    private long mNativeTabAndroid;
-
-    /** Unique id of this tab (within its container). */
-    private final int mId;
-
-    /** Whether or not this tab is an incognito tab. */
-    private final boolean mIncognito;
-
-    /** An Application {@link Context}.  Unlike {@link #mContext}, this is the only one that is
-     * publicly exposed to help prevent leaking the {@link Activity}. */
-    private final Context mApplicationContext;
-
-    /** The {@link Context} used to create {@link View}s and other Android components.  Unlike
-     * {@link #mApplicationContext}, this is not publicly exposed to help prevent leaking the
-     * {@link Activity}. */
-    private final Context mContext;
-
-    /** Gives {@link TabBase} a way to interact with the Android window. */
-    private final WindowAndroid mWindowAndroid;
-
-    /** The current native page (e.g. chrome-native://newtab), or {@code null} if there is none. */
-    private NativePage mNativePage;
-
-    /** The {@link ContentView} showing the current page or {@code null} if the tab is frozen. */
-    private ContentView mContentView;
-
-    /** InfoBar container to show InfoBars for this tab. */
-    private InfoBarContainer mInfoBarContainer;
-
-    /** Manages app banners shown for this tab. */
-    private AppBannerManager mAppBannerManager;
-
-    /** The sync id of the TabBase if session sync is enabled. */
-    private int mSyncId;
-
-    /**
-     * The {@link ContentViewCore} for the current page, provided for convenience. This always
-     * equals {@link ContentView#getContentViewCore()}, or {@code null} if mContentView is
-     * {@code null}.
-     */
-    private ContentViewCore mContentViewCore;
-
-    /**
-     * A list of TabBase observers.  These are used to broadcast TabBase events to listeners.
-     */
-    private final ObserverList<TabObserver> mObservers = new ObserverList<TabObserver>();
-
-    // Content layer Observers and Delegates
-    private ContentViewClient mContentViewClient;
-    private WebContentsObserverAndroid mWebContentsObserver;
-    private VoiceSearchTabHelper mVoiceSearchTabHelper;
-    private TabBaseChromeWebContentsDelegateAndroid mWebContentsDelegate;
-
-    /**
-     * A default {@link ChromeContextMenuItemDelegate} that supports some of the context menu
-     * functionality.
-     */
-    protected class TabBaseChromeContextMenuItemDelegate
-            extends EmptyChromeContextMenuItemDelegate {
-        private final Clipboard mClipboard;
-
-        /**
-         * Builds a {@link TabBaseChromeContextMenuItemDelegate} instance.
-         */
-        public TabBaseChromeContextMenuItemDelegate() {
-            mClipboard = new Clipboard(getApplicationContext());
-        }
-
-        @Override
-        public boolean isIncognito() {
-            return mIncognito;
-        }
-
-        @Override
-        public void onSaveToClipboard(String text, boolean isUrl) {
-            mClipboard.setText(text, text);
-        }
-
-        @Override
-        public void onSaveImageToClipboard(String url) {
-            mClipboard.setHTMLText("<img src=\"" + url + "\">", url, url);
-        }
-    }
-
-    /**
-     * A basic {@link ChromeWebContentsDelegateAndroid} that forwards some calls to the registered
-     * {@link TabObserver}s.  Meant to be overridden by subclasses.
-     */
-    public class TabBaseChromeWebContentsDelegateAndroid
-            extends ChromeWebContentsDelegateAndroid {
-        @Override
-        public void onLoadProgressChanged(int progress) {
-            for (TabObserver observer : mObservers) {
-                observer.onLoadProgressChanged(TabBase.this, progress);
-            }
-        }
-
-        @Override
-        public void onUpdateUrl(String url) {
-            for (TabObserver observer : mObservers) observer.onUpdateUrl(TabBase.this, url);
-        }
-
-        @Override
-        public void showRepostFormWarningDialog(final ContentViewCore contentViewCore) {
-            RepostFormWarningDialog warningDialog = new RepostFormWarningDialog(
-                    new Runnable() {
-                        @Override
-                        public void run() {
-                            contentViewCore.cancelPendingReload();
-                        }
-                    }, new Runnable() {
-                        @Override
-                        public void run() {
-                            contentViewCore.continuePendingReload();
-                        }
-                    });
-            Activity activity = (Activity) mContext;
-            warningDialog.show(activity.getFragmentManager(), null);
-        }
-
-        @Override
-        public void toggleFullscreenModeForTab(boolean enableFullscreen) {
-            for (TabObserver observer : mObservers) {
-                observer.onToggleFullscreenMode(TabBase.this, enableFullscreen);
-            }
-        }
-
-        @Override
-        public void navigationStateChanged(int flags) {
-            if ((flags & INVALIDATE_TYPE_TITLE) != 0) {
-                for (TabObserver observer : mObservers) observer.onTitleUpdated(TabBase.this);
-            }
-            if ((flags & INVALIDATE_TYPE_URL) != 0) {
-                for (TabObserver observer : mObservers) observer.onUrlUpdated(TabBase.this);
-            }
-        }
-    }
-
-    private class TabBaseContextMenuPopulator extends ContextMenuPopulatorWrapper {
-        public TabBaseContextMenuPopulator(ContextMenuPopulator populator) {
-            super(populator);
-        }
-
-        @Override
-        public void buildContextMenu(ContextMenu menu, Context context, ContextMenuParams params) {
-            super.buildContextMenu(menu, context, params);
-            for (TabObserver observer : mObservers) observer.onContextMenuShown(TabBase.this, menu);
-        }
-    }
-
-    private class TabBaseWebContentsObserverAndroid extends WebContentsObserverAndroid {
-        public TabBaseWebContentsObserverAndroid(ContentViewCore contentViewCore) {
-            super(contentViewCore);
-        }
-
-        @Override
-        public void navigationEntryCommitted() {
-            if (getNativePage() != null) {
-                pushNativePageStateToNavigationEntry();
-            }
-        }
-
-        @Override
-        public void didFailLoad(boolean isProvisionalLoad, boolean isMainFrame, int errorCode,
-                String description, String failingUrl) {
-            for (TabObserver observer : mObservers) {
-                observer.onDidFailLoad(TabBase.this, isProvisionalLoad, isMainFrame, errorCode,
-                        description, failingUrl);
-            }
-        }
-    }
-
-    /**
-     * Creates an instance of a {@link TabBase} with no id.
-     * @param incognito Whether or not this tab is incognito.
-     * @param context   An instance of a {@link Context}.
-     * @param window    An instance of a {@link WindowAndroid}.
-     */
-    public TabBase(boolean incognito, Context context, WindowAndroid window) {
-        this(INVALID_TAB_ID, incognito, context, window);
-    }
-
-    /**
-     * Creates an instance of a {@link TabBase}.
-     * @param id        The id this tab should be identified with.
-     * @param incognito Whether or not this tab is incognito.
-     * @param context   An instance of a {@link Context}.
-     * @param window    An instance of a {@link WindowAndroid}.
-     */
-    public TabBase(int id, boolean incognito, Context context, WindowAndroid window) {
-        // We need a valid Activity Context to build the ContentView with.
-        assert context == null || context instanceof Activity;
-
-        mId = generateValidId(id);
-        mIncognito = incognito;
-        // TODO(dtrainor): Only store application context here.
-        mContext = context;
-        mApplicationContext = context != null ? context.getApplicationContext() : null;
-        mWindowAndroid = window;
-    }
-
-    /**
-     * Adds a {@link TabObserver} to be notified on {@link TabBase} changes.
-     * @param observer The {@link TabObserver} to add.
-     */
-    public final void addObserver(TabObserver observer) {
-        mObservers.addObserver(observer);
-    }
-
-    /**
-     * Removes a {@link TabObserver}.
-     * @param observer The {@link TabObserver} to remove.
-     */
-    public final void removeObserver(TabObserver observer) {
-        mObservers.removeObserver(observer);
-    }
-
-    /**
-     * @return Whether or not this tab has a previous navigation entry.
-     */
-    public boolean canGoBack() {
-        return mContentViewCore != null && mContentViewCore.canGoBack();
-    }
-
-    /**
-     * @return Whether or not this tab has a navigation entry after the current one.
-     */
-    public boolean canGoForward() {
-        return mContentViewCore != null && mContentViewCore.canGoForward();
-    }
-
-    /**
-     * Goes to the navigation entry before the current one.
-     */
-    public void goBack() {
-        if (mContentViewCore != null) mContentViewCore.goBack();
-    }
-
-    /**
-     * Goes to the navigation entry after the current one.
-     */
-    public void goForward() {
-        if (mContentViewCore != null) mContentViewCore.goForward();
-    }
-
-    @Override
-    public NavigationHistory getDirectedNavigationHistory(boolean isForward, int itemLimit) {
-        if (mContentViewCore != null) {
-            return mContentViewCore.getDirectedNavigationHistory(isForward, itemLimit);
-        } else {
-            return new NavigationHistory();
-        }
-    }
-
-    @Override
-    public void goToNavigationIndex(int index) {
-        if (mContentViewCore != null) mContentViewCore.goToNavigationIndex(index);
-    }
-
-    /**
-     * Loads the current navigation if there is a pending lazy load (after tab restore).
-     */
-    public void loadIfNecessary() {
-        if (mContentViewCore != null) mContentViewCore.loadIfNecessary();
-    }
-
-    /**
-     * Requests the current navigation to be loaded upon the next call to loadIfNecessary().
-     */
-    protected void requestRestoreLoad() {
-        if (mContentViewCore != null) mContentViewCore.requestRestoreLoad();
-    }
-
-    /**
-     * @return Whether or not the {@link TabBase} is currently showing an interstitial page, such as
-     *         a bad HTTPS page.
-     */
-    public boolean isShowingInterstitialPage() {
-        ContentViewCore contentViewCore = getContentViewCore();
-        return contentViewCore != null && contentViewCore.isShowingInterstitialPage();
-    }
-
-    /**
-     * @return Whether or not the tab has something valid to render.
-     */
-    public boolean isReady() {
-        return mNativePage != null || (mContentViewCore != null && mContentViewCore.isReady());
-    }
-
-    /**
-     * @return The {@link View} displaying the current page in the tab. This might be a
-     *         {@link ContentView} but could potentially be any instance of {@link View}. This can
-     *         be {@code null}, if the tab is frozen or being initialized or destroyed.
-     */
-    public View getView() {
-        PageInfo pageInfo = getPageInfo();
-        return pageInfo != null ? pageInfo.getView() : null;
-    }
-
-    /**
-     * @return The width of the content of this tab.  Can be 0 if there is no content.
-     */
-    public int getWidth() {
-        View view = getView();
-        return view != null ? view.getWidth() : 0;
-    }
-
-    /**
-     * @return The height of the content of this tab.  Can be 0 if there is no content.
-     */
-    public int getHeight() {
-        View view = getView();
-        return view != null ? view.getHeight() : 0;
-    }
-
-    /**
-     * @return The application {@link Context} associated with this tab.
-     */
-    protected Context getApplicationContext() {
-        return mApplicationContext;
-    }
-
-    /**
-     * @return The infobar container.
-     */
-    public final InfoBarContainer getInfoBarContainer() {
-        return mInfoBarContainer;
-    }
-
-    /**
-     * Create an {@code AutoLoginProcessor} to decide how to handle login
-     * requests.
-     */
-    protected abstract AutoLoginProcessor createAutoLoginProcessor();
-
-    /**
-     * Prints the current page.
-     *
-     * @return Whether the printing process is started successfully.
-     **/
-    public boolean print() {
-        assert mNativeTabAndroid != 0;
-        return nativePrint(mNativeTabAndroid);
-    }
-
-    /**
-     * Reloads the current page content if it is a {@link ContentView}.
-     */
-    public void reload() {
-        // TODO(dtrainor): Should we try to rebuild the ContentView if it's frozen?
-        if (mContentViewCore != null) mContentViewCore.reload(true);
-    }
-
-    /**
-     * Reloads the current page content if it is a {@link ContentView}.
-     * This version ignores the cache and reloads from the network.
-     */
-    public void reloadIgnoringCache() {
-        if (mContentViewCore != null) mContentViewCore.reloadIgnoringCache(true);
-    }
-
-    /** Stop the current navigation. */
-    public void stopLoading() {
-        if (mContentViewCore != null) mContentViewCore.stopLoading();
-    }
-
-    /**
-     * @return The background color of the tab.
-     */
-    public int getBackgroundColor() {
-        return getPageInfo() != null ? getPageInfo().getBackgroundColor() : Color.WHITE;
-    }
-
-    /**
-     * @return The web contents associated with this tab.
-     */
-    public WebContents getWebContents() {
-        if (mNativeTabAndroid == 0) return null;
-        return nativeGetWebContents(mNativeTabAndroid);
-    }
-
-    /**
-     * @return The profile associated with this tab.
-     */
-    public Profile getProfile() {
-        if (mNativeTabAndroid == 0) return null;
-        return nativeGetProfileAndroid(mNativeTabAndroid);
-    }
-
-    /**
-     * @return The id representing this tab.
-     */
-    @CalledByNative
-    public int getId() {
-        return mId;
-    }
-
-    /**
-     * @return Whether or not this tab is incognito.
-     */
-    public boolean isIncognito() {
-        return mIncognito;
-    }
-
-    /**
-     * @return The {@link ContentView} associated with the current page, or {@code null} if
-     *         there is no current page or the current page is displayed using something besides a
-     *         {@link ContentView}.
-     */
-    public ContentView getContentView() {
-        return mNativePage == null ? mContentView : null;
-    }
-
-    /**
-     * @return The {@link ContentViewCore} associated with the current page, or {@code null} if
-     *         there is no current page or the current page is displayed using something besides a
-     *         {@link ContentView}.
-     */
-    public ContentViewCore getContentViewCore() {
-        return mNativePage == null ? mContentViewCore : null;
-    }
-
-    /**
-     * @return A {@link PageInfo} describing the current page.  This is always not {@code null}
-     *         except during initialization, destruction, and when the tab is frozen.
-     */
-    public PageInfo getPageInfo() {
-        return mNativePage != null ? mNativePage : mContentView;
-    }
-
-    /**
-     * @return The {@link NativePage} associated with the current page, or {@code null} if there is
-     *         no current page or the current page is displayed using something besides
-     *         {@link NativePage}.
-     */
-    public NativePage getNativePage() {
-        return mNativePage;
-    }
-
-    /**
-     * @return Whether or not the {@link TabBase} represents a {@link NativePage}.
-     */
-    public boolean isNativePage() {
-        return mNativePage != null;
-    }
-
-    /**
-     * Set whether or not the {@link ContentViewCore} should be using a desktop user agent for the
-     * currently loaded page.
-     * @param useDesktop     If {@code true}, use a desktop user agent.  Otherwise use a mobile one.
-     * @param reloadOnChange Reload the page if the user agent has changed.
-     */
-    public void setUseDesktopUserAgent(boolean useDesktop, boolean reloadOnChange) {
-        if (mContentViewCore != null) {
-            mContentViewCore.setUseDesktopUserAgent(useDesktop, reloadOnChange);
-        }
-    }
-
-    /**
-     * @return Whether or not the {@link ContentViewCore} is using a desktop user agent.
-     */
-    public boolean getUseDesktopUserAgent() {
-        return mContentViewCore != null && mContentViewCore.getUseDesktopUserAgent();
-    }
-
-    /**
-     * @return The current {ToolbarModelSecurityLevel} for the tab.
-     */
-    public int getSecurityLevel() {
-        if (mNativeTabAndroid == 0) return ToolbarModelSecurityLevel.NONE;
-        return nativeGetSecurityLevel(mNativeTabAndroid);
-    }
-
-    /**
-     * @return The sync id of the tab if session sync is enabled, {@code 0} otherwise.
-     */
-    @CalledByNative
-    protected int getSyncId() {
-        return mSyncId;
-    }
-
-    /**
-     * @param syncId The sync id of the tab if session sync is enabled.
-     */
-    @CalledByNative
-    protected void setSyncId(int syncId) {
-        mSyncId = syncId;
-    }
-
-    /**
-     * @return An {@link ObserverList.RewindableIterator} instance that points to all of
-     *         the current {@link TabObserver}s on this class.  Note that calling
-     *         {@link java.util.Iterator#remove()} will throw an
-     *         {@link UnsupportedOperationException}.
-     */
-    protected ObserverList.RewindableIterator<TabObserver> getTabObservers() {
-        return mObservers.rewindableIterator();
-    }
-
-    /**
-     * @return The {@link ContentViewClient} currently bound to any {@link ContentViewCore}
-     *         associated with the current page.  There can still be a {@link ContentViewClient}
-     *         even when there is no {@link ContentViewCore}.
-     */
-    protected ContentViewClient getContentViewClient() {
-        return mContentViewClient;
-    }
-
-    /**
-     * @param client The {@link ContentViewClient} to be bound to any current or new
-     *               {@link ContentViewCore}s associated with this {@link TabBase}.
-     */
-    protected void setContentViewClient(ContentViewClient client) {
-        if (mContentViewClient == client) return;
-
-        ContentViewClient oldClient = mContentViewClient;
-        mContentViewClient = client;
-
-        if (mContentViewCore == null) return;
-
-        if (mContentViewClient != null) {
-            mContentViewCore.setContentViewClient(mContentViewClient);
-        } else if (oldClient != null) {
-            // We can't set a null client, but we should clear references to the last one.
-            mContentViewCore.setContentViewClient(new ContentViewClient());
-        }
-    }
-
-    /**
-     * Triggers the showing logic for the view backing this tab.
-     */
-    protected void show() {
-        if (mContentViewCore != null) mContentViewCore.onShow();
-    }
-
-    /**
-     * Triggers the hiding logic for the view backing the tab.
-     */
-    protected void hide() {
-        if (mContentViewCore != null) mContentViewCore.onHide();
-    }
-
-    /**
-     * Shows the given {@code nativePage} if it's not already showing.
-     * @param nativePage The {@link NativePage} to show.
-     */
-    protected void showNativePage(NativePage nativePage) {
-        if (mNativePage == nativePage) return;
-        NativePage previousNativePage = mNativePage;
-        mNativePage = nativePage;
-        pushNativePageStateToNavigationEntry();
-        for (TabObserver observer : mObservers) observer.onContentChanged(this);
-        destroyNativePageInternal(previousNativePage);
-    }
-
-    /**
-     * Hides the current {@link NativePage}, if any, and shows the {@link ContentView}.
-     */
-    protected void showRenderedPage() {
-        if (mNativePage == null) return;
-        NativePage previousNativePage = mNativePage;
-        mNativePage = null;
-        for (TabObserver observer : mObservers) observer.onContentChanged(this);
-        destroyNativePageInternal(previousNativePage);
-    }
-
-    /**
-     * Initializes this {@link TabBase}.
-     */
-    public void initialize() {
-        initializeNative();
-    }
-
-    /**
-     * Builds the native counterpart to this class.  Meant to be overridden by subclasses to build
-     * subclass native counterparts instead.  Subclasses should not call this via super and instead
-     * rely on the native class to create the JNI association.
-     */
-    protected void initializeNative() {
-        if (mNativeTabAndroid == 0) nativeInit();
-        assert mNativeTabAndroid != 0;
-    }
-
-    /**
-     * A helper method to initialize a {@link ContentView} without any native WebContents pointer.
-     */
-    protected final void initContentView() {
-        initContentView(ContentViewUtil.createNativeWebContents(mIncognito));
-    }
-
-    /**
-     * Completes the {@link ContentView} specific initialization around a native WebContents
-     * pointer.  {@link #getPageInfo()} will still return the {@link NativePage} if there is one.
-     * All initialization that needs to reoccur after a web contents swap should be added here.
-     * <p />
-     * NOTE: If you attempt to pass a native WebContents that does not have the same incognito
-     * state as this tab this call will fail.
-     *
-     * @param nativeWebContents The native web contents pointer.
-     */
-    protected void initContentView(long nativeWebContents) {
-        NativePage previousNativePage = mNativePage;
-        mNativePage = null;
-        destroyNativePageInternal(previousNativePage);
-
-        mContentView = ContentView.newInstance(mContext, nativeWebContents, getWindowAndroid());
-
-        mContentViewCore = mContentView.getContentViewCore();
-        mWebContentsDelegate = createWebContentsDelegate();
-        mWebContentsObserver = new TabBaseWebContentsObserverAndroid(mContentViewCore);
-        mVoiceSearchTabHelper = new VoiceSearchTabHelper(mContentViewCore);
-
-        if (mContentViewClient != null) mContentViewCore.setContentViewClient(mContentViewClient);
-
-        assert mNativeTabAndroid != 0;
-        nativeInitWebContents(
-                mNativeTabAndroid, mIncognito, mContentViewCore, mWebContentsDelegate,
-                new TabBaseContextMenuPopulator(createContextMenuPopulator()));
-
-        // In the case where restoring a Tab or showing a prerendered one we already have a
-        // valid infobar container, no need to recreate one.
-        if (mInfoBarContainer == null) {
-            // The InfoBarContainer needs to be created after the ContentView has been natively
-            // initialized.
-            mInfoBarContainer = new InfoBarContainer(
-                    (Activity) mContext, createAutoLoginProcessor(), getId(), getContentView(),
-                    nativeWebContents);
-        } else {
-            mInfoBarContainer.onParentViewChanged(getId(), getContentView());
-        }
-
-        if (AppBannerManager.isEnabled() && mAppBannerManager == null) {
-            mAppBannerManager = new AppBannerManager(this);
-        }
-
-        for (TabObserver observer : mObservers) observer.onContentChanged(this);
-    }
-
-    /**
-     * Cleans up all internal state, destroying any {@link NativePage} or {@link ContentView}
-     * currently associated with this {@link TabBase}.  This also destroys the native counterpart
-     * to this class, which means that all subclasses should erase their native pointers after
-     * this method is called.  Once this call is made this {@link TabBase} should no longer be used.
-     */
-    public void destroy() {
-        for (TabObserver observer : mObservers) observer.onDestroyed(this);
-
-        NativePage currentNativePage = mNativePage;
-        mNativePage = null;
-        destroyNativePageInternal(currentNativePage);
-        destroyContentView(true);
-
-        // Destroys the native tab after destroying the ContentView but before destroying the
-        // InfoBarContainer. The native tab should be destroyed before the infobar container as
-        // destroying the native tab cleanups up any remaining infobars. The infobar container
-        // expects all infobars to be cleaned up before its own destruction.
-        assert mNativeTabAndroid != 0;
-        nativeDestroy(mNativeTabAndroid);
-        assert mNativeTabAndroid == 0;
-
-        if (mInfoBarContainer != null) {
-            mInfoBarContainer.destroy();
-            mInfoBarContainer = null;
-        }
-    }
-
-    /**
-     * @return Whether or not this Tab has a live native component.
-     */
-    public boolean isInitialized() {
-        return mNativeTabAndroid != 0;
-    }
-
-    /**
-     * @return The url associated with the tab.
-     */
-    @CalledByNative
-    public String getUrl() {
-        return mContentView != null ? mContentView.getUrl() : "";
-    }
-
-    /**
-     * @return The tab title.
-     */
-    @CalledByNative
-    public String getTitle() {
-        return getPageInfo() != null ? getPageInfo().getTitle() : "";
-    }
-
-    /**
-     * @return The bitmap of the favicon scaled to 16x16dp. null if no favicon
-     *         is specified or it requires the default favicon.
-     *         TODO(bauerb): Upstream implementation.
-     */
-    public Bitmap getFavicon() {
-        return null;
-    }
-
-    /**
-     * Restores the tab if it is frozen or crashed.
-     * @return true iff tab restore was triggered.
-     */
-    @CalledByNative
-    public boolean restoreIfNeeded() {
-        return false;
-    }
-
-    private void destroyNativePageInternal(NativePage nativePage) {
-        if (nativePage == null) return;
-        assert getPageInfo() != nativePage : "Attempting to destroy active page.";
-
-        nativePage.destroy();
-    }
-
-    /**
-     * Destroys the current {@link ContentView}.
-     * @param deleteNativeWebContents Whether or not to delete the native WebContents pointer.
-     */
-    protected final void destroyContentView(boolean deleteNativeWebContents) {
-        if (mContentView == null) return;
-
-        destroyContentViewInternal(mContentView);
-
-        if (mInfoBarContainer != null && mInfoBarContainer.getParent() != null) {
-            mInfoBarContainer.removeFromParentView();
-        }
-        if (mContentViewCore != null) mContentViewCore.destroy();
-
-        mContentView = null;
-        mContentViewCore = null;
-        mWebContentsDelegate = null;
-        mWebContentsObserver = null;
-        mVoiceSearchTabHelper = null;
-
-        assert mNativeTabAndroid != 0;
-        nativeDestroyWebContents(mNativeTabAndroid, deleteNativeWebContents);
-    }
-
-    /**
-     * Gives subclasses the chance to clean up some state associated with this {@link ContentView}.
-     * This is because {@link #getContentView()} can return {@code null} if a {@link NativePage}
-     * is showing.
-     * @param contentView The {@link ContentView} that should have associated state cleaned up.
-     */
-    protected void destroyContentViewInternal(ContentView contentView) {
-    }
-
-    /**
-     * A helper method to allow subclasses to build their own delegate.
-     * @return An instance of a {@link TabBaseChromeWebContentsDelegateAndroid}.
-     */
-    protected TabBaseChromeWebContentsDelegateAndroid createWebContentsDelegate() {
-        return new TabBaseChromeWebContentsDelegateAndroid();
-    }
-
-    /**
-     * A helper method to allow subclasses to build their own menu populator.
-     * @return An instance of a {@link ContextMenuPopulator}.
-     */
-    protected ContextMenuPopulator createContextMenuPopulator() {
-        return new ChromeContextMenuPopulator(new TabBaseChromeContextMenuItemDelegate());
-    }
-
-    /**
-     * @return The {@link WindowAndroid} associated with this {@link TabBase}.
-     */
-    public WindowAndroid getWindowAndroid() {
-        return mWindowAndroid;
-    }
-
-    /**
-     * @return The current {@link TabBaseChromeWebContentsDelegateAndroid} instance.
-     */
-    protected TabBaseChromeWebContentsDelegateAndroid getChromeWebContentsDelegateAndroid() {
-        return mWebContentsDelegate;
-    }
-
-    /**
-     * Called when the favicon of the content this tab represents changes.
-     */
-    @CalledByNative
-    protected void onFaviconUpdated() {
-        for (TabObserver observer : mObservers) observer.onFaviconUpdated(this);
-    }
-
-    /**
-     * Called when the navigation entry containing the historyitem changed,
-     * for example because of a scroll offset or form field change.
-     */
-    @CalledByNative
-    protected void onNavEntryChanged() {
-    }
-
-    /**
-     * @return The native pointer representing the native side of this {@link TabBase} object.
-     */
-    @CalledByNative
-    protected long getNativePtr() {
-        return mNativeTabAndroid;
-    }
-
-    /** This is currently called when committing a pre-rendered page. */
-    @CalledByNative
-    private void swapWebContents(
-            final long newWebContents, boolean didStartLoad, boolean didFinishLoad) {
-        int originalWidth = 0;
-        int originalHeight = 0;
-        if (mContentViewCore != null) {
-            originalWidth = mContentViewCore.getViewportWidthPix();
-            originalHeight = mContentViewCore.getViewportHeightPix();
-            mContentViewCore.onHide();
-        }
-        destroyContentView(false);
-        NativePage previousNativePage = mNativePage;
-        mNativePage = null;
-        initContentView(newWebContents);
-        // Size of the new ContentViewCore is zero at this point. If we don't call onSizeChanged(),
-        // next onShow() call would send a resize message with the current ContentViewCore size
-        // (zero) to the renderer process, although the new size will be set soon.
-        // However, this size fluttering may confuse Blink and rendered result can be broken
-        // (see http://crbug.com/340987).
-        mContentViewCore.onSizeChanged(originalWidth, originalHeight, 0, 0);
-        mContentViewCore.onShow();
-        mContentViewCore.attachImeAdapter();
-        for (TabObserver observer : mObservers) observer.onContentChanged(this);
-        destroyNativePageInternal(previousNativePage);
-        for (TabObserver observer : mObservers) {
-            observer.onWebContentsSwapped(this, didStartLoad, didFinishLoad);
-        }
-    }
-
-    @CalledByNative
-    private void clearNativePtr() {
-        assert mNativeTabAndroid != 0;
-        mNativeTabAndroid = 0;
-    }
-
-    @CalledByNative
-    private void setNativePtr(long nativePtr) {
-        assert mNativeTabAndroid == 0;
-        mNativeTabAndroid = nativePtr;
-    }
-
-    @CalledByNative
-    private long getNativeInfoBarContainer() {
-        return getInfoBarContainer().getNative();
-    }
-
-    /**
-     * Validates {@code id} and increments the internal counter to make sure future ids don't
-     * collide.
-     * @param id The current id.  Maybe {@link #INVALID_TAB_ID}.
-     * @return   A new id if {@code id} was {@link #INVALID_TAB_ID}, or {@code id}.
-     */
-    private static int generateValidId(int id) {
-        if (id == INVALID_TAB_ID) id = generateNextId();
-        incrementIdCounterTo(id + 1);
-
-        return id;
-    }
-
-    /**
-     * @return An unused id.
-     */
-    private static int generateNextId() {
-        return sIdCounter.getAndIncrement();
-    }
-
-    private void pushNativePageStateToNavigationEntry() {
-        assert mNativeTabAndroid != 0 && getNativePage() != null;
-        nativeSetActiveNavigationEntryTitleForUrl(mNativeTabAndroid, getNativePage().getUrl(),
-                getNativePage().getTitle());
-    }
-
-    /**
-     * Ensures the counter is at least as high as the specified value.  The counter should always
-     * point to an unused ID (which will be handed out next time a request comes in).  Exposed so
-     * that anything externally loading tabs and ids can set enforce new tabs start at the correct
-     * id.
-     * TODO(aurimas): Investigate reducing the visiblity of this method.
-     * @param id The minimum id we should hand out to the next new tab.
-     */
-    public static void incrementIdCounterTo(int id) {
-        int diff = id - sIdCounter.get();
-        if (diff <= 0) return;
-        // It's possible idCounter has been incremented between the get above and the add below
-        // but that's OK, because in the worst case we'll overly increment idCounter.
-        sIdCounter.addAndGet(diff);
-    }
-
-    private native void nativeInit();
-    private native void nativeDestroy(long nativeTabAndroid);
-    private native void nativeInitWebContents(long nativeTabAndroid, boolean incognito,
-            ContentViewCore contentViewCore, ChromeWebContentsDelegateAndroid delegate,
-            ContextMenuPopulator contextMenuPopulator);
-    private native void nativeDestroyWebContents(long nativeTabAndroid, boolean deleteNative);
-    private native WebContents nativeGetWebContents(long nativeTabAndroid);
-    private native Profile nativeGetProfileAndroid(long nativeTabAndroid);
-    private native int nativeGetSecurityLevel(long nativeTabAndroid);
-    private native void nativeSetActiveNavigationEntryTitleForUrl(long nativeTabAndroid, String url,
-            String title);
-    private native boolean nativePrint(long nativeTabAndroid);
-}