Improve transition between opaque and translucent compositor views.

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

 // Copyright 2015 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.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.SearchManager;
@@ skipping 325 matching lines @@
                 }
             };
             manager.addTouchExplorationStateChangeListener(mTouchExplorationStateChangeListener);
         }
 
         // Make the activity listen to policy change events
         CombinedPolicyProvider.get().addPolicyChangeListener(this);
 
         // Set up the animation placeholder to be the SurfaceView. This disables the
         // SurfaceView's 'hole' clipping during animations that are notified to the window.
-        mWindowAndroid.setAnimationPlaceholderView(mCompositorViewHolder.getSurfaceView());
+        mWindowAndroid.setAnimationPlaceholderView(mCompositorViewHolder.getCompositorView());
 
         // Inform the WindowAndroid of the keyboard accessory view.
         mWindowAndroid.setKeyboardAccessoryView((ViewGroup) findViewById(R.id.keyboard_accessory));
         initializeToolbar();
         initializeTabModels();
         if (!isFinishing() && getFullscreenManager() != null) {
             getFullscreenManager().initialize(
                     (ControlContainer) findViewById(R.id.control_container),
                     getTabModelSelector(),
                     getControlContainerHeightResource());
@@ skipping 1748 matching lines @@
      * draw over VR contents should be hidden in this call.
      */
     public void onEnterVR() {}
 
     /**
      * Called when VR mode using this activity is exited. Any state set for VR should be restored
      * in this call, including showing 2D UI that was hidden.
      */
     public void onExitVR() {}
 }