[Android] Adding scheduling through GcmNetworkManager

components/background_task_scheduler/android/java/src/org/chromium/components/background_task_scheduler/BackgroundTaskScheduler.java

Index: components/background_task_scheduler/android/java/src/org/chromium/components/background_task_scheduler/BackgroundTaskScheduler.java
diff --git a/components/background_task_scheduler/android/java/src/org/chromium/components/background_task_scheduler/BackgroundTaskScheduler.java b/components/background_task_scheduler/android/java/src/org/chromium/components/background_task_scheduler/BackgroundTaskScheduler.java
index ea633c0188c861299b59385da950629a075ce072..31f087ff96c2a6a824b0a94990760e86372e0a7c 100644
--- a/components/background_task_scheduler/android/java/src/org/chromium/components/background_task_scheduler/BackgroundTaskScheduler.java
+++ b/components/background_task_scheduler/android/java/src/org/chromium/components/background_task_scheduler/BackgroundTaskScheduler.java
@@ -75,6 +75,7 @@ public class BackgroundTaskScheduler {
      */
     public boolean schedule(Context context, TaskInfo taskInfo) {
         ThreadUtils.assertOnUiThread();
+        BackgroundTaskSchedulerPrefs.addScheduledTask(taskInfo);
         return mSchedulerDelegate.schedule(context, taskInfo);
     }
 
@@ -86,6 +87,7 @@ public class BackgroundTaskScheduler {
      */
     public void cancel(Context context, int taskId) {
         ThreadUtils.assertOnUiThread();
+        BackgroundTaskSchedulerPrefs.removeScheduledTask(taskId);
         mSchedulerDelegate.cancel(context, taskId);
     }
 }