ServiceWorker: Add layout tests for fetch event response

Source/modules/serviceworkers/Response.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 Response_h
 #define Response_h
 
 #include "bindings/v8/Dictionary.h"
 #include "bindings/v8/ScriptWrappable.h"
 #include "modules/serviceworkers/HeaderMap.h"
 #include "platform/blob/BlobData.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink { class WebServiceWorkerResponse; }
 
 namespace WebCore {
 
 class Blob;
 struct ResponseInit;
 
 class Response FINAL : public ScriptWrappable, public RefCounted<Response> {
 public:
-    static PassRefPtr<Response> create(const Dictionary& responseInit);
     static PassRefPtr<Response> create(Blob* body, const Dictionary& responseInit);
     ~Response() { };
 
     unsigned short status() const { return m_status; }
     String statusText() const { return m_statusText; }
     PassRefPtr<HeaderMap> headers() const;
 
     void populateWebServiceWorkerResponse(blink::WebServiceWorkerResponse&);
 
 private:
     Response(PassRefPtr<BlobDataHandle>, const ResponseInit&);
     unsigned short m_status;
     String m_statusText;
     RefPtr<HeaderMap> m_headers;
     RefPtr<BlobDataHandle> m_blobDataHandle;
 };
 
 } // namespace WebCore
 
 #endif // Response_h