Add the data attribute to the Notification object

Source/modules/notifications/Notification.h

Index: Source/modules/notifications/Notification.h
diff --git a/Source/modules/notifications/Notification.h b/Source/modules/notifications/Notification.h
index 4074afbeba9fe6eeb0739c61ab33505b0d1f502c..1f780a0a9bfdd265eb3e0c2c89bc3e0ed2ae1cb6 100644
--- a/Source/modules/notifications/Notification.h
+++ b/Source/modules/notifications/Notification.h
@@ -31,6 +31,7 @@
 #ifndef Notification_h
 #define Notification_h
 
+#include "bindings/core/v8/SerializedScriptValue.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "modules/EventTargetModules.h"
 #include "platform/AsyncMethodRunner.h"
@@ -40,13 +41,17 @@
 #include "public/platform/modules/notifications/WebNotificationDelegate.h"
 #include "public/platform/modules/notifications/WebNotificationPermission.h"
 #include "wtf/PassOwnPtr.h"
+#include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
+#include "wtf/RefPtr.h"
 
 namespace blink {
 
 class ExecutionContext;
 class NotificationOptions;
 class NotificationPermissionCallback;
+class ScriptState;
+class ScriptValue;
 struct WebNotificationData;
 
 class Notification final : public RefCountedGarbageCollectedEventTargetWithInlineData<Notification>, public ActiveDOMObject, public WebNotificationDelegate {
@@ -83,9 +88,11 @@ public:
     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 String permissionString(WebNotificationPermission);
     static String permission(ExecutionContext*);
@@ -121,6 +128,7 @@ private:
     void setIconUrl(KURL iconUrl) { m_iconUrl = iconUrl; }
     void setTag(const String& tag) { m_tag = tag; }
     void setSilent(bool silent) { m_silent = silent; }
+    void setSerializedData(PassRefPtr<SerializedScriptValue> data) { m_serializedData = data; }
 
     void setPersistentId(const String& persistentId) { m_persistentId = persistentId; }
 
@@ -131,6 +139,7 @@ private:
     String m_body;
     String m_tag;
     bool m_silent;
+    RefPtr<SerializedScriptValue> m_serializedData;
 
     KURL m_iconUrl;