[Offline pages] Creating BackgroundJobScheduler, which uses JobScheduler

chrome/android/junit/src/org/chromium/chrome/browser/offlinepages/ShadowGcmNetworkManager.java

 // Copyright 2016 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.offlinepages;
 
 import com.google.android.gms.gcm.GcmNetworkManager;
 import com.google.android.gms.gcm.GcmTaskService;
 import com.google.android.gms.gcm.Task;
 
 import org.robolectric.annotation.Implementation;
 import org.robolectric.annotation.Implements;
 
-
 /**
  * Custom shadow for the OS's GcmNetworkManager.  We use this to hook the call to GcmNetworkManager
  * to make sure it was invoked as we expect.
  */
 @Implements(GcmNetworkManager.class)
 public class ShadowGcmNetworkManager {
     private Task mTask;
     private Task mCanceledTask;
 
     @Implementation
@@ skipping 17 matching lines @@
 
     public Task getCanceledTask() {
         return mCanceledTask;
     }
 
     public void clear() {
         mTask = null;
         mCanceledTask = null;
     }
 }