Implement support for silent 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 32 matching lines @@
   bool never_timeout;
   base::Time timestamp;
   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;
+  bool silent;
 };
 
 class MESSAGE_CENTER_EXPORT Notification {
  public:
   Notification(NotificationType type,
                const std::string& id,
                const base::string16& title,
                const base::string16& message,
                const gfx::Image& icon,
                const base::string16& display_source,
@@ skipping 33 matching lines @@
   const NotifierId& notifier_id() const { return notifier_id_; }
 
   void set_profile_id(const std::string& profile_id) {
     notifier_id_.profile_id = profile_id;
   }
 
   // Begin unpacked values from optional_fields.
   int priority() const { return optional_fields_.priority; }
   void set_priority(int priority) { optional_fields_.priority = priority; }
 
+  bool silent() const { return optional_fields_.silent; }
+  void set_silent(bool silent) { optional_fields_.silent = silent; }
+
   base::Time timestamp() const { return optional_fields_.timestamp; }
   void set_timestamp(const base::Time& timestamp) {
     optional_fields_.timestamp = timestamp;
   }
 
   const base::string16& context_message() const {
     return optional_fields_.context_message;
   }
   void set_context_message(const base::string16& context_message) {
     optional_fields_.context_message = context_message;
@@ skipping 109 matching lines @@
   bool is_read_;  // True if this has been seen 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_