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

ui/message_center/notification.h

 // Copyright (c) 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_NOTIFICATION_H_
 #define UI_MESSAGE_CENTER_NOTIFICATION_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 27 matching lines @@
   RichNotificationData();
   RichNotificationData(const RichNotificationData& other);
   ~RichNotificationData();
 
   int priority;
   bool never_timeout;
   base::Time timestamp;
   base::string16 expanded_message;
   base::string16 context_message;
   gfx::Image image;
+  gfx::Image small_image;
   std::vector<NotificationItem> items;
   int progress;
   std::vector<ButtonInfo> buttons;
   bool should_make_spoken_feedback_for_popup_updates;
   bool clickable;
 };
 
 class MESSAGE_CENTER_EXPORT Notification {
  public:
   Notification(NotificationType type,
@@ skipping 68 matching lines @@
   void set_progress(int progress) { optional_fields_.progress = progress; }
   // End unpacked values.
 
   // Images fetched asynchronously.
   const gfx::Image& icon() const { return icon_; }
   void set_icon(const gfx::Image& icon) { icon_ = icon; }
 
   const gfx::Image& image() const { return optional_fields_.image; }
   void set_image(const gfx::Image& image) { optional_fields_.image = image; }
 
+  const gfx::Image& small_image() const { return optional_fields_.small_image; }
+  void set_small_image(const gfx::Image& image) {
+    optional_fields_.small_image = image;
+  }
+
   // Buttons, with icons fetched asynchronously.
   const std::vector<ButtonInfo>& buttons() const {
     return optional_fields_.buttons;
   }
   void set_buttons(const std::vector<ButtonInfo>& buttons) {
     optional_fields_.buttons = buttons;
   }
   void SetButtonIcon(size_t index, const gfx::Image& icon);
 
   bool shown_as_popup() const { return shown_as_popup_; }
@@ skipping 78 matching lines @@
   bool is_expanded_;  // True if this has been expanded in the message center.
 
   // A proxy object that allows access back to the JavaScript object that
   // represents the notification, for firing events.
   scoped_refptr<NotificationDelegate> delegate_;
 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_NOTIFICATION_H_