Added support for image notifications.

ui/message_center/message_center.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 UI_MESSAGE_CENTER_MESSAGE_CENTER_H_
 #define UI_MESSAGE_CENTER_MESSAGE_CENTER_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 111 matching lines @@
 
   // Removes an existing notification.
   void RemoveNotification(const std::string& id);
 
   void SetNotificationPrimaryIcon(const std::string& id,
                                   const gfx::ImageSkia& image);
 
   void SetNotificationSecondaryIcon(const std::string& id,
                                     const gfx::ImageSkia& image);
 
+  void SetNotificationImage(const std::string& id, const gfx::ImageSkia& image);
+
   NotificationList* notification_list() { return notification_list_.get(); }
 
   // Overridden from NotificationList::Delegate.
   virtual void SendRemoveNotification(const std::string& id) OVERRIDE;
   virtual void SendRemoveAllNotifications() OVERRIDE;
   virtual void DisableNotificationByExtension(const std::string& id) OVERRIDE;
   virtual void DisableNotificationByUrl(const std::string& id) OVERRIDE;
   virtual void ShowNotificationSettings(const std::string& id) OVERRIDE;
   virtual void OnNotificationClicked(const std::string& id) OVERRIDE;
   virtual void OnQuietModeChanged(bool quiet_mode) OVERRIDE;
@@ skipping 11 matching lines @@
   scoped_ptr<NotificationList> notification_list_;
   ObserverList<Observer> observer_list_;
   Delegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageCenter);
 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_MESSAGE_CENTER_H_