Adding implementation for MessageCenter::Delegate on MessageCeneterNotificationManager.

chrome/browser/notifications/message_center_notification_manager.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_NOTIFICATIONS_MESSAGE_CENTER_NOTIFICATION_MANAGER_H_
 #define CHROME_BROWSER_NOTIFICATIONS_MESSAGE_CENTER_NOTIFICATION_MANAGER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 72 matching lines @@
 
   // Use a map by notification_id since this mapping is the most often used.
   typedef std::map<std::string, ProfileNotification*> NotificationMap;
   NotificationMap profile_notifications_;
 
   // Helpers that add/remove the notification from local map and MessageCenter.
   // They take ownership of profile_notification object.
   void AddProfileNotification(ProfileNotification* profile_notification);
   void RemoveProfileNotification(ProfileNotification* profile_notification);
 
+  ProfileNotification* FindProfileNotification(const std::string& id) const;
+
   DISALLOW_COPY_AND_ASSIGN(MessageCenterNotificationManager);
 };
 
 #endif  // CHROME_BROWSER_NOTIFICATIONS_MESSAGE_CENTER_NOTIFICATION_MANAGER_H_