NOT FOR REVIEW: Modify ToggleFullscreenMode.

android_webview/java/src/org/chromium/android_webview/AwContentViewClient.java

 // Copyright 2013 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.android_webview;
 
 import android.content.Context;
 import android.view.KeyEvent;
 import android.view.View;
 import android.webkit.URLUtil;
@@ skipping 70 matching lines @@
     @Override
     public void exitFullscreenVideo() {
         exitFullscreen();
     }
 
     @Override
     public View getVideoLoadingProgressView() {
         return mAwContentsClient.getVideoLoadingProgressView();
     }
 
-    @Override
+    /**
+     * Called when a non-video element has entered fullscreen. For video elements see
+     * {@link ContentVideoViewClient#enterFullscreenVideo(android.view.View)}.
+     */
     public void enterFullscreen() {
         WebChromeClient.CustomViewCallback cb = new WebChromeClient.CustomViewCallback() {
             @Override
             public void onCustomViewHidden() {
                 mAwContents.requestExitFullscreen();
             }
         };
         enterFullscreen(null, cb);
     }
 
-    @Override
+    /**
+     * Called when a non-video element has exited fullscreen. For video elements see
+     * {@link ContentVideoViewClient#exitFullscreenVideo()}.
+     */
     public void exitFullscreen() {
         mAwContents.exitFullScreen();
         mAwContentsClient.onHideCustomView();
     }
 
     private void enterFullscreen(View videoView, WebChromeClient.CustomViewCallback cb) {
         if (mAwContents.isFullScreen()) {
             return;
         }
         View fullscreenView = mAwContents.enterFullScreen();
         if (fullscreenView == null) {
             return;
         }
 
         if (videoView == null) {
             // The fullscreenView contains the non-video element in fullscreen.
             mAwContentsClient.onShowCustomView(fullscreenView, cb);
         } else {
             // The videoView contains the video and the fullscreenView the html5 controls.
             FrameLayout viewGroup = new FrameLayout(mContext);
             viewGroup.addView(videoView);
             viewGroup.addView(fullscreenView);
             mAwContentsClient.onShowCustomView(viewGroup, cb);
         }
     }
 }