[Offline pages] Implementation of OfflineBackgroundTask using background_task_scheduler

chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java
index 15eca7e2938c02849512fb30acd433c695430f9a..1ed08e911e367e4fe89820faf3ff355e91c05254 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java
@@ -31,6 +31,15 @@ public class BackgroundSchedulerBridge {
                 callback);
     }
 
+    /**
+     * Stops scheduled processing.
+     * @return true, as it always expects to be rescheduled.
+     */
+    public static boolean stopScheduledProcessing() {
+        nativeStopScheduledProcessing();
+        return true;
+    }
+
     @CalledByNative
     private static void schedule(TriggerConditions triggerConditions) {
         BackgroundScheduler.getInstance(ContextUtils.getApplicationContext())
@@ -77,4 +86,6 @@ public class BackgroundSchedulerBridge {
     /** Instructs the native RequestCoordinator to start processing. */
     private static native boolean nativeStartScheduledProcessing(boolean powerConnected,
             int batteryPercentage, int netConnectionType, Callback<Boolean> callback);
+    /** Instructs the native RequestCoordinator to stop processing. */
+    private static native void nativeStopScheduledProcessing();
 }