[Background Sync] Use GcmNetworkManager to start the browser for sync events.

chrome/android/shell/java/AndroidManifest.xml.jinja2

 <?xml version="1.0" encoding="utf-8"?>
 
 <!-- Copyright 2014 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.
  -->
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="org.chromium.chrome.shell">
@@ skipping 144 matching lines @@
         <service android:exported="false"
                  android:name="org.chromium.chrome.browser.notifications.NotificationService"/>
         <receiver android:exported="false"
                   android:name="org.chromium.chrome.browser.notifications.NotificationService$Receiver">
             <intent-filter>
                 <action android:name="org.chromium.chrome.browser.notifications.CLICK_NOTIFICATION" />
                 <action android:name="org.chromium.chrome.browser.notifications.CLOSE_NOTIFICATION" />
             </intent-filter>
         </receiver>
 
-        <!-- Service Worker Background Sync service listener -->
+        <!-- Service Worker Background Sync GCM scheduler task -->
         <service android:name="org.chromium.content.browser.BackgroundSyncLauncherService"
-            android:exported="false" />
-        <receiver android:name="org.chromium.content.browser.BackgroundSyncLauncherService$Receiver">
+            android:permission="com.google.android.gms.permission.BIND_NETWORK_TASK_SERVICE"
+            android:exported="true">
             <intent-filter>
-                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
+                <action android:name="com.google.android.gms.gcm.ACTION_TASK_READY" />
             </intent-filter>
-        </receiver>
+        </service>
 
         <provider android:name="org.chromium.chrome.browser.ChromeBrowserProvider"
                   android:authorities="org.chromium.chrome.shell"
                   android:exported="true" />
 
         <!-- Provider for FileProvider. -->
         <provider android:name="android.support.v4.content.FileProvider"
             android:authorities="org.chromium.chrome.shell.FileProvider"
             android:exported="false"
             android:grantUriPermissions="true">
@@ skipping 56 matching lines @@
         <!-- Media route controllers to use for remote playback (cast).
              This is here, rather than in code, since it varies between upstream and downstream,
              yet we need this list of classes in the notification service, which belongs upstream
              and doesn't run the downstream Clank startup code. The Cast code will, for each media element,
              choose the first MediaRouteController that can play it, so the order of the list can be important.
              The most specific MediaRouteControllers should be listed first, followed by more generic ones -->
         <meta-data android:name="org.chromium.content.browser.REMOTE_MEDIA_PLAYERS"
             android:value="org.chromium.chrome.browser.media.remote.DefaultMediaRouteController"/>
     </application>
 </manifest>