Improve transition between opaque and translucent compositor views.

chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.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.ActivityManager;
@@ skipping 1689 matching lines @@
         // 4. Ask TabPersistentStore to merge state.
         RecordUserAction.record("Android.MergeState.Live");
         mTabModelSelectorImpl.mergeState();
 
         setMergedInstanceTaskId(getTaskId());
     }
 
     // TODO(mthiesse): Toggle toolbar overlay, popups, etc.
     public void setUIVisibilityForVR(int visibility) {
         mControlContainer.setVisibility(visibility);
-        getCompositorViewHolder().getSurfaceView().setVisibility(visibility);
+        getCompositorViewHolder().getCompositorView().setVisibility(visibility);
         getCompositorViewHolder().setVisibility(visibility);
     }
 
     /**
      * 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.
      */
     @TargetApi(25)
     private void reportNewTabShortcutUsed(boolean isIncognito) {
@@ skipping 38 matching lines @@
 
         ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
         for (AppTask task : manager.getAppTasks()) {
             RecentTaskInfo info = DocumentUtils.getTaskInfoFromTask(task);
             if (info == null) continue;
             if (info.id == sMergedInstanceTaskId) return true;
         }
         return false;
     }
 }