Merge java_staging/src into java/src.

chrome/android/java/src/org/chromium/chrome/browser/ntp/RecentTabsManager.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.ntp;
 
 import android.content.Context;
 import android.graphics.Bitmap;
 
 import org.chromium.base.ObserverList;
@@ skipping 429 matching lines @@
     @Override
     public void registerForSyncUpdates(AndroidSyncSettingsObserver changeListener) {
         mObservers.addObserver(changeListener);
     }
 
     @Override
     public void unregisterForSyncUpdates(AndroidSyncSettingsObserver changeListener) {
         mObservers.removeObserver(changeListener);
     }
 }