Notificaitons refactor step 2

ui/message_center/notification_view.h

Index: ui/message_center/notification_view.h
diff --git a/ui/message_center/notification_view.h b/ui/message_center/notification_view.h
index 1b9b630509a25581f815320a0259fd467582eb6d..f1acd2c2047a52e48291df5661f5bbc8ef71ee05 100644
--- a/ui/message_center/notification_view.h
+++ b/ui/message_center/notification_view.h
@@ -20,11 +20,11 @@ class NotificationView : public MessageView {
   // always NotificationView instances but in the future may be instances of
   // other classes, with the class depending on the notification type.
   static MessageView* ViewForNotification(
-      const Notification& notification,
+      Notification* notification,
       NotificationList::Delegate* list_delegate);
 
   NotificationView(NotificationList::Delegate* list_delegate,
-                   const Notification& notification);
+                   Notification* notification);
   virtual ~NotificationView();
 
   // Overridden from View.