[WIP] add "auto" attr in notifications

public/platform/modules/notifications/WebNotificationData.h

 // Copyright 2014 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 WebNotificationData_h
 #define WebNotificationData_h
 
 #include "public/platform/WebString.h"
 #include "public/platform/WebURL.h"
 
 namespace blink {
 
 // Structure representing the data associated with a Web Notification.
 struct WebNotificationData {
     enum Direction {
         DirectionLeftToRight,
-        DirectionRightToLeft
+        DirectionRightToLeft,
+        DirectionAuto
     };
 
     WebNotificationData()
-        : direction(DirectionLeftToRight)
+        : direction(DirectionAuto)
         , silent(false)
     {
     }
 
     // FIXME: Remove this constructor when Chromium has switched to the new one.
     WebNotificationData(const WebString& title, Direction direction, const WebString& lang, const WebString& body, const WebString& tag, const WebURL& icon, bool silent)
         : title(title)
         , direction(direction)
         , lang(lang)
         , body(body)
@@ skipping 21 matching lines @@
     WebString body;
     WebString tag;
     WebURL icon;
     bool silent;
     WebString data;
 };
 
 } // namespace blink
 
 #endif // WebNotificationData_h