Fix system notifications incorrectly marked as type WEB_PAGE

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 41dfa2149443ca5c0d012a1c722a4335f0585dfd..f4dce7b2672514bbc7343ec37669c3f9b214245b 100644
--- a/ui/message_center/notification.h
+++ b/ui/message_center/notification.h
@@ -41,7 +41,6 @@ class MESSAGE_CENTER_EXPORT RichNotificationData {
   ~RichNotificationData();
 
   int priority;
-  bool is_web_notification;
   bool never_timeout;
   base::Time timestamp;
   base::string16 context_message;
@@ -76,7 +75,7 @@ class MESSAGE_CENTER_EXPORT Notification {
   virtual ~Notification();
 
   // Copies the internal on-memory state from |base|, i.e. shown_as_popup,
-  // is_read, is_web_notification and never_timeout.
+  // is_read and never_timeout.
   void CopyState(Notification* base);
 
   NotificationType type() const { return type_; }
@@ -194,14 +193,6 @@ class MESSAGE_CENTER_EXPORT Notification {
   // The notification with lesser serial_number is considered 'older'.
   unsigned serial_number() { return serial_number_; }
 
-  // Gets and sets whether this was shown using the Web Notifications API.
-  bool is_web_notification() const {
-    return optional_fields_.is_web_notification;
-  }
-  void set_is_web_notification(bool is_web_notification) {
-    optional_fields_.is_web_notification = is_web_notification;
-  }
-
   // Gets and sets whether the notifiction should remain onscreen permanently.
   bool never_timeout() const { return optional_fields_.never_timeout; }
   void set_never_timeout(bool never_timeout) {