Add the data attribute to the Notification object

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"
+#include "public/web/WebSerializedScriptValue.h"

[Peter Beverloo, 2015/03/12 20:30:46]

public/platform/ (where this files live in) cannot depend on public/web/ :-(.

There's a FIXME in WebSerializedScriptValue about it being in platform.

Because that's another larger issue, perhaps you can consider reverting the
changes in ServiceWorkerRegistrationNotifications.* and WebNotificationData.h in
this patch, and landing the implementation for non-persistent notifications
first.

Then, as a follow-up, pursue moving WebSerializedScriptValue to platform and
updating this code path to pass a WebSerializedScriptValue to the embedder?

[Sanghyun Park, 2015/03/13 02:57:07]

I refer the this document about this.
[1] http://www.chromium.org/blink/public-c-api
"shows the overall dependency layers. Things higher up in the diagram depend
only on things below them." is described in this document.
According to the above, "Blink public platform API" can depend on  "Blink public
web API".

If my understanding is wrong, please let me know..

[Sanghyun Park, 2015/03/13 07:58:08]

Oops. I'm misunderstanding, At first, I'll split the patch.
and I'll consider about this.

 
 namespace blink {
 
 // Structure representing the data associated with a Web Notification.
 struct WebNotificationData {
     enum Direction {
         DirectionLeftToRight,
         DirectionRightToLeft
     };
 
     WebNotificationData()
         : direction(DirectionLeftToRight)
         , 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)
         : title(title)
         , direction(direction)
         , lang(lang)
         , body(body)
         , tag(tag)
         , icon(icon)
         , silent(false)
     {
     }
 
-    WebNotificationData(const WebString& title, Direction direction, const WebString& lang, const WebString& body, const WebString& tag, const WebURL& icon, bool silent)
+    WebNotificationData(const WebString& title, Direction direction, const WebString& lang, const WebString& body, const WebString& tag, const WebURL& icon, bool silent, const WebSerializedScriptValue& data)
         : title(title)
         , direction(direction)
         , lang(lang)
         , body(body)
         , tag(tag)
         , icon(icon)
         , silent(silent)
+        , data(data)
     {
     }
 
     WebString title;
     Direction direction;
     WebString lang;
     WebString body;
     WebString tag;
     WebURL icon;
     bool silent;
+    WebSerializedScriptValue data;
 };
 
 } // namespace blink
 
 #endif // WebNotificationData_h