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

ui/message_center/notification_list.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_NOTIFICATION_LIST_H_
 #define UI_MESSAGE_CENTER_NOTIFICATION_LIST_H_
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 64 matching lines @@
 
   // Returns true if the notification exists and was updated.
   bool SetNotificationImage(const std::string& notification_id,
                             const gfx::Image& image);
 
   // Returns true if the notification and button exist and were updated.
   bool SetNotificationButtonIcon(const std::string& notification_id,
                                  int button_index,
                                  const gfx::Image& image);
 
+  // Returns true if the notification exists and was updated.
+  bool SetNotificationSmallImage(const std::string& notification_id,
+                                 const gfx::Image& image);
+
   // Returns true if |id| matches a notification in the list.
   bool HasNotification(const std::string& id);
 
   // Returns true if |id| matches a notification in the list and that
   // notification's type matches the given type.
   bool HasNotificationOfType(const std::string& id,
                              const NotificationType type);
 
   // Returns false if the first notification has been shown as a popup (which
   // means that all notifications have been shown).
@@ skipping 55 matching lines @@
   Notifications notifications_;
   bool message_center_visible_;
   bool quiet_mode_;
 
   DISALLOW_COPY_AND_ASSIGN(NotificationList);
 };
 
 }  // namespace message_center
 
 #endif // UI_MESSAGE_CENTER_NOTIFICATION_LIST_H_