Don't use webmediaplayer to FullscreenController about fullscreen change

android_webview/java/src/org/chromium/android_webview/AwWebContentsDelegateAdapter.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.os.Handler;
 import android.os.Message;
 import android.util.Log;
 import android.view.KeyEvent;
 import android.view.View;
 import android.webkit.ConsoleMessage;
 import android.webkit.ValueCallback;
 
 import org.chromium.base.ThreadUtils;
+import org.chromium.content.browser.ContentVideoView;
 import org.chromium.content.browser.ContentViewCore;
 
 /**
  * Adapts the AwWebContentsDelegate interface to the AwContentsClient interface.
  * This class also serves a secondary function of routing certain callbacks from the content layer
  * to specific listener interfaces.
  */
 class AwWebContentsDelegateAdapter extends AwWebContentsDelegate {
     private static final String TAG = "AwWebContentsDelegateAdapter";
 
@@ skipping 158 matching lines @@
 
     @Override
     public boolean addNewContents(boolean isDialog, boolean isUserGesture) {
         return mContentsClient.onCreateWindow(isDialog, isUserGesture);
     }
 
     @Override
     public void activateContents() {
         mContentsClient.onRequestFocus();
     }
+
+    @Override
+    public void toggleFullscreenModeForTab(boolean enterFullscreen) {
+        if (!enterFullscreen) {
+            ContentVideoView videoView = ContentVideoView.getContentVideoView();
+            if (videoView != null) videoView.exitFullscreen(false);
+        }
+    }
 }