Add toV8Value which takes creation context and isolate to WebBlob as arguments.

Source/web/WebBlob.cpp

 /*
  * Copyright (C) 2011 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 65 matching lines @@
     m_private = other.m_private;
 }
 
 WebString WebBlob::uuid()
 {
     if (!m_private.get())
         return WebString();
     return m_private->uuid();
 }
 
+v8::Handle<v8::Value> WebBlob::toV8Value(v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
+{
+    if (!m_private.get())
+        return v8::Handle<v8::Value>();
+    return toV8(m_private.get(), creationContext, isolate);
+}
+
 v8::Handle<v8::Value> WebBlob::toV8Value()
 {
-    if (!m_private.get())
-        return v8::Handle<v8::Value>();
-    return toV8(m_private.get(), v8::Handle<v8::Object>(), v8::Isolate::GetCurrent());
+    return toV8Value(v8::Handle<v8::Object>(), v8::Isolate::GetCurrent());
 }
 
 WebBlob::WebBlob(const PassRefPtrWillBeRawPtr<WebCore::Blob>& blob)
     : m_private(blob)
 {
 }
 
 WebBlob& WebBlob::operator=(const PassRefPtrWillBeRawPtr<WebCore::Blob>& blob)
 {
     m_private = blob;
     return *this;
 }
 
 } // namespace blink