Move NotificationDelegate into message_center.

ui/message_center/message_center_impl.h

Index: ui/message_center/message_center_impl.h
diff --git a/ui/message_center/message_center_impl.h b/ui/message_center/message_center_impl.h
index 3e3672dc77e2540b548197fcac448832eb3b3399..cc660aee32b4c44e157f3a5583b334d03c00d9f9 100644
--- a/ui/message_center/message_center_impl.h
+++ b/ui/message_center/message_center_impl.h
@@ -11,6 +11,8 @@
 
 namespace message_center {
 
+class NotificationDelegate;
+
 // The default implementation of MessageCenter.
 class MessageCenterImpl : public MessageCenter {
  public:
@@ -29,20 +31,20 @@ class MessageCenterImpl : public MessageCenter {
   virtual bool IsQuietMode() const OVERRIDE;
   virtual const NotificationList::Notifications& GetNotifications() OVERRIDE;
   virtual NotificationList::PopupNotifications GetPopupNotifications() OVERRIDE;
-  virtual void AddNotification(
-      NotificationType type,
-      const std::string& id,
-      const string16& title,
-      const string16& message,
-      const string16& display_source,
-      const std::string& extension_id,
-      const base::DictionaryValue* optional_fields) OVERRIDE;
-  virtual void UpdateNotification(
-      const std::string& old_id,
-      const std::string& new_id,
-      const string16& title,
-      const string16& message,
-      const base::DictionaryValue* optional_fields) OVERRIDE;
+  virtual void AddNotification(NotificationType type,
+                               const std::string& id,
+                               const string16& title,
+                               const string16& message,
+                               const string16& display_source,
+                               const std::string& extension_id,
+                               const base::DictionaryValue* optional_fields,
+                               NotificationDelegate* delegate) OVERRIDE;
+  virtual void UpdateNotification(const std::string& old_id,
+                                  const std::string& new_id,
+                                  const string16& title,
+                                  const string16& message,
+                                  const base::DictionaryValue* optional_fields)
+      OVERRIDE;
   virtual void RemoveNotification(const std::string& id, bool by_user) OVERRIDE;
   virtual void RemoveAllNotifications(bool by_user) OVERRIDE;
   virtual void SetNotificationIcon(const std::string& notification_id,