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

chrome/android/java/AndroidManifest.xml

Index: chrome/android/java/AndroidManifest.xml
diff --git a/chrome/android/java/AndroidManifest.xml b/chrome/android/java/AndroidManifest.xml
index 3974442fc31fec74a59d4c0eb7f67437418616ee..ee06c7a7c1f5bc70a90de78fdf9c55b43c22fbe4 100644
--- a/chrome/android/java/AndroidManifest.xml
+++ b/chrome/android/java/AndroidManifest.xml
@@ -44,6 +44,7 @@ by a child template that "extends" this file.
     <uses-permission android:name="android.permission.NFC"/>
     <uses-permission android:name="android.permission.READ_SYNC_SETTINGS"/>
     <uses-permission android:name="android.permission.READ_SYNC_STATS"/>
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

[jkarlin, 2015/09/04 13:21:35]

I'm pretty sure that this is a new permission for Chrome, meaning it would delay
adoption. My guess is that it's a non-starter. We'll have to remove this in each
manifest file. :[

[iclelland, 2015/09/10 20:40:46]

Acknowledged -- I'll run this past some Android folks to make sure that's the
case before I do that, though.

     <uses-permission android:name="android.permission.RECORD_AUDIO"/>
     <uses-permission android:name="android.permission.USE_CREDENTIALS"/>
     <uses-permission android:name="android.permission.VIBRATE"/>
@@ -551,14 +552,14 @@ by a child template that "extends" this file.
             </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>
 
         <service android:name="org.chromium.chrome.browser.prerender.ChromePrerenderService"
             android:exported="true"