Add badge to web notifications.

content/child/notifications/pending_notification.h

Index: content/child/notifications/pending_notification.h
diff --git a/content/child/notifications/pending_notification.h b/content/child/notifications/pending_notification.h
index 304cf5f582fca435fb916dcdac52bd84d16698ad..dc7036bf004ae7368b77611128c441a3a5895079 100644
--- a/content/child/notifications/pending_notification.h
+++ b/content/child/notifications/pending_notification.h
@@ -48,15 +48,20 @@ class PendingNotification {
 
   // To be called on the worker thread when the notification icon has been
   // fetched.
-  void DidFetchNotificationIcon(const SkBitmap& notification_icon);
+  void DidFetchNotificationIcon(const SkBitmap& bitmap);
+
+  // To be called on the worker thread when the badge has been fetched.
+  void DidFetchBadge(const SkBitmap& bitmap);
 
   // To be called on the worker thread when an action icon has been fetched.
-  void DidFetchActionIcon(size_t action_index, const SkBitmap& action_icon);
+  void DidFetchActionIcon(size_t action_index, const SkBitmap& bitmap);
 
   scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
 
   SkBitmap notification_icon_;
 
+  SkBitmap badge_;
+
   std::vector<SkBitmap> action_icons_;
 
   base::Closure fetches_finished_barrier_closure_;