[Android] BackgroundTaskScheduler reschedule implementation

chrome/android/java/AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- 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. -->
 
 <!--
 Note: This is a jinja2 template, processed at build time into the final manifest.
 
 Blocks denoted with { % block some_name % }foo{ % endblock % } can be overridden
 by a child template that "extends" this file.
@@ skipping 784 matching lines @@
         <!-- Android Notification job service -->
         <service android:name="org.chromium.chrome.browser.notifications.NotificationJobService"
             android:exported="false"
             android:permission="android.permission.BIND_JOB_SERVICE"/>
 
         <!-- Background Task Scheduler job service -->
         <service android:name="org.chromium.components.background_task_scheduler.BackgroundTaskJobService"
             android:exported="false"
             android:permission="android.permission.BIND_JOB_SERVICE"/>
 
+        <!-- Background Task Scheduler GCM task service -->
+        <service android:name="org.chromium.components.background_task_scheduler.BackgroundTaskGcmTaskService"
+            android:permission="com.google.android.gms.permission.BIND_NETWORK_TASK_SERVICE"
+            android:exported="true">

[nyquist, 2017/04/18 22:33:02]

Are there any security measures we should take with this since it's exported?
Can we verify the bind is from Google Play services?

[fgorski, 2017/04/20 19:09:58]

I am not sure how that would be done. This was taken straight from the
ChromeBackgroundService... I don't know that there is any check there either.

Let's sync about that.

+            <intent-filter>
+                <action android:name="com.google.android.gms.gcm.ACTION_TASK_READY" />
+            </intent-filter>
+        </service>
+
         <!-- GcmTaskService implementation to wake Chrome on scheduled events -->
         <service android:name="org.chromium.chrome.browser.ChromeBackgroundService"
             android:permission="com.google.android.gms.permission.BIND_NETWORK_TASK_SERVICE"
             android:exported="true">
             <intent-filter>
                 <action android:name="com.google.android.gms.gcm.ACTION_TASK_READY" />
             </intent-filter>
         </service>
 
         <service android:name="org.chromium.chrome.browser.prerender.ChromePrerenderService"
@@ skipping 158 matching lines @@
              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.
              The downstream manifest replaces this block, and hence replaces the list of media route
              controllers with its own list. -->
         <meta-data android:name="org.chromium.content.browser.REMOTE_MEDIA_PLAYERS"
             android:value="org.chromium.chrome.browser.media.remote.DefaultMediaRouteController"/>
 
         {% endblock %}
     </application>
 </manifest>