Adds the contextMessage field to 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 25 matching lines @@
 class MESSAGE_CENTER_EXPORT RichNotificationData {
  public:
   RichNotificationData();
   RichNotificationData(const RichNotificationData& other);
   ~RichNotificationData();
 
   int priority;
   bool never_timeout;
   base::Time timestamp;
   string16 expanded_message;
+  string16 context_message;
   gfx::Image image;
   std::vector<NotificationItem> items;
   int progress;
   std::vector<ButtonInfo> buttons;
 };
 
 class MESSAGE_CENTER_EXPORT Notification {
  public:
   Notification(NotificationType type,
                const std::string& id,
@@ skipping 38 matching lines @@
     optional_fields_.timestamp = timestamp;
   }
 
   const string16& expanded_message() const {
     return optional_fields_.expanded_message;
   }
   void set_expanded_message(const string16& expanded_message) {
     optional_fields_.expanded_message = expanded_message;
   }
 
+  const string16& context_message() const {
+    return optional_fields_.context_message;
+  }
+  void set_context_message(const string16& context_message) {
+    optional_fields_.context_message = context_message;
+  }
+
   const std::vector<NotificationItem>& items() const {
     return optional_fields_.items;
   }
   void set_items(const std::vector<NotificationItem>& items) {
     optional_fields_.items = items;
   }
 
   int progress() const { return optional_fields_.progress; }
   void set_progress(int progress) { optional_fields_.progress = progress; }
   // End unpacked values.
@@ skipping 86 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_