[WIP] add "auto" attr in notifications

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 72 matching lines @@
 
     String title() const { return m_title; }
     String dir() const { return m_dir; }
     String lang() const { return m_lang; }
     String body() const { return m_body; }
     String tag() const { return m_tag; }
     String icon() const { return m_iconUrl; }
     bool silent() const { return m_silent; }
     ScriptValue data(ScriptState*) const;
 
-    TextDirection direction() const;
     KURL iconURL() const { return m_iconUrl; }
     SerializedScriptValue* serializedData() const { return m_serializedData.get(); }
 
+    static WebNotificationData directionStringToEnum(String direction);
     static String permissionString(WebNotificationPermission);
     static String permission(ExecutionContext*);
     static WebNotificationPermission checkPermission(ExecutionContext*);
     static void requestPermission(ExecutionContext*, NotificationPermissionCallback* = nullptr);
 
     // EventTarget interface.
     virtual ExecutionContext* executionContext() const override final { return ActiveDOMObject::executionContext(); }
     virtual bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>) override final;
     virtual const AtomicString& interfaceName() const override;
 
@@ skipping 53 matching lines @@
     void setState(NotificationState state) { m_state = state; }
 
     NotificationState m_state;
 
     AsyncMethodRunner<Notification> m_asyncRunner;
 };
 
 } // namespace blink
 
 #endif // Notification_h