Add the data attribute to the Notification object

Source/web/WebSerializedScriptValue.cpp

Index: Source/web/WebSerializedScriptValue.cpp
diff --git a/Source/web/WebSerializedScriptValue.cpp b/Source/web/WebSerializedScriptValue.cpp
index 685ecefb342474059d6889e7fbc3826c83378492..f8674177d6280b250577a82da765eb38fcf4cace 100644
--- a/Source/web/WebSerializedScriptValue.cpp
+++ b/Source/web/WebSerializedScriptValue.cpp
@@ -82,6 +82,11 @@ WebSerializedScriptValue::WebSerializedScriptValue(const PassRefPtr<SerializedSc
 {
 }
 
+WebSerializedScriptValue::WebSerializedScriptValue(SerializedScriptValue* value)

[Peter Beverloo, 2015/03/12 01:16:26]

Why do we need this?

In ServiceWorkerRegistrationNotifications::showNotification() you're using
RefPtr<>.release(), which gives us a PassRefPtr, and therefore should hit the
normal constructor.

[Sanghyun Park, 2015/03/12 02:58:47]

This function is for sending "data" in non-persistent notification.
but non-persistance do not use data in WebSerializedScriptValue anymore.
So, I'll remove this. 

+    : m_private(value)
+{
+}
+
 WebSerializedScriptValue& WebSerializedScriptValue::operator=(const PassRefPtr<SerializedScriptValue>& value)
 {
     m_private = value;