Add badge to web notifications.

third_party/WebKit/Source/modules/notifications/Notification.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 73 matching lines @@
     void dispatchClickEvent() override;
     void dispatchErrorEvent() override;
     void dispatchCloseEvent() override;
 
     String title() const;
     String dir() const;
     String lang() const;
     String body() const;
     String tag() const;
     String icon() const;
+    String badge() const;
     NavigatorVibration::VibrationPattern vibrate(bool& isNull) const;
     DOMTimeStamp timestamp() const;
     bool renotify() const;
     bool silent() const;
     bool requireInteraction() const;
     ScriptValue data(ScriptState*);
     HeapVector<NotificationAction> actions() const;
 
     static String permissionString(WebNotificationPermission);
     static String permission(ExecutionContext*);
@@ skipping 52 matching lines @@
     void setState(NotificationState state) { m_state = state; }
 
     NotificationState m_state;
 
     Member<AsyncMethodRunner<Notification>> m_asyncRunner;
 };
 
 } // namespace blink
 
 #endif // Notification_h