Google Now Message Center Stats

ui/message_center/message_center.h

Index: ui/message_center/message_center.h
diff --git a/ui/message_center/message_center.h b/ui/message_center/message_center.h
index 6ad648afbf45bb93727f9c2eb5a1b6af58faf928..7ed5e228f680445599ab8c156c3df4077d560429 100644
--- a/ui/message_center/message_center.h
+++ b/ui/message_center/message_center.h
@@ -125,7 +125,9 @@ class MESSAGE_CENTER_EXPORT MessageCenter {
   // This should be called by UI classes when a notification is first displayed
   // to the user, in order to decrement the unread_count for the tray, and to
   // notify observers that the notification is visible.
-  virtual void DisplayedNotification(const std::string& id) = 0;
+  virtual void DisplayedNotification(
+      const std::string& id,
+      const NotificationDisplaySource source) = 0;
 
   // Setter/getter of notifier settings provider. This will be a weak reference.
   // This should be set at the initialization process. The getter may return