Implementation of renotify flag for Notifications.

ui/message_center/notification.h

Index: ui/message_center/notification.h
diff --git a/ui/message_center/notification.h b/ui/message_center/notification.h
index 491943d6e07529f1399d54440aef7c64a799d89f..342a3ff345dc970740ac7e7784691ae81756bdd0 100644
--- a/ui/message_center/notification.h
+++ b/ui/message_center/notification.h
@@ -55,6 +55,7 @@ class MESSAGE_CENTER_EXPORT RichNotificationData {
   bool clickable;
   std::vector<int> vibration_pattern;
   bool silent;
+  bool renotify;
 };
 
 class MESSAGE_CENTER_EXPORT Notification {
@@ -127,6 +128,12 @@ class MESSAGE_CENTER_EXPORT Notification {
   bool silent() const { return optional_fields_.silent; }
   void set_silent(bool silent) { optional_fields_.silent = silent; }
 
+  // This property currently has no effect on non-Android platforms.
+  // It determines whether the sound and vibration effects should signal
+  // if the notification is replacing another notification.
+  bool renotify() const { return optional_fields_.renotify; }
+  void set_renotify(bool renotify) { optional_fields_.renotify = renotify; }
+
   base::Time timestamp() const { return optional_fields_.timestamp; }
   void set_timestamp(const base::Time& timestamp) {
     optional_fields_.timestamp = timestamp;