Adds a small icon to notifications, and connects it to synced notifications.

ui/message_center/fake_message_center.h

 // Copyright 2013 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_FAKE_MESSAGE_CENTER_H_
 #define UI_MESSAGE_CENTER_FAKE_MESSAGE_CENTER_H_
 
 #include "ui/message_center/message_center.h"
 #include "ui/message_center/message_center_types.h"
 
@@ skipping 27 matching lines @@
       OVERRIDE;
 
   virtual void RemoveNotification(const std::string& id, bool by_user) OVERRIDE;
   virtual void RemoveAllNotifications(bool by_user) OVERRIDE;
   virtual void RemoveAllVisibleNotifications(bool by_user) OVERRIDE;
   virtual void SetNotificationIcon(const std::string& notification_id,
                                    const gfx::Image& image) OVERRIDE;
 
   virtual void SetNotificationImage(const std::string& notification_id,
                                     const gfx::Image& image) OVERRIDE;
+  virtual void SetNotificationSmallImage(const std::string& notification_id,
+                                         const gfx::Image& image) OVERRIDE;
 
   virtual void SetNotificationButtonIcon(const std::string& notification_id,
                                          int button_index,
                                          const gfx::Image& image) OVERRIDE;
   virtual void DisableNotificationsByNotifier(
       const NotifierId& notifier_id) OVERRIDE;
   virtual void ExpandNotification(const std::string& id) OVERRIDE;
   virtual void ClickOnNotification(const std::string& id) OVERRIDE;
   virtual void ClickOnNotificationButton(const std::string& id,
                                          int button_index) OVERRIDE;
@@ skipping 16 matching lines @@
 
  private:
   const NotificationList::Notifications empty_notifications_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeMessageCenter);
 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_FAKE_MESSAGE_CENTER_H_