ServiceWorker: Add layout tests for fetch event response

Source/modules/serviceworkers/Response.cpp

 // 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.
 
 #include "config.h"
 #include "Response.h"
 
 #include "bindings/v8/Dictionary.h"
 #include "core/fileapi/Blob.h"
 #include "modules/serviceworkers/ResponseInit.h"
 #include "platform/NotImplemented.h"
 #include "public/platform/WebServiceWorkerResponse.h"
 
 namespace WebCore {
 
-// FIXME: Remove this legacy function when the required Chromium-side patch lands.
-PassRefPtr<Response> Response::create(const Dictionary& responseInit)
-{
-    return create(nullptr, responseInit);
-}
-
 PassRefPtr<Response> Response::create(Blob* body, const Dictionary& responseInit)
 {
     RefPtr<BlobDataHandle> blobDataHandle = body ? body->blobDataHandle() : nullptr;
 
     // FIXME: Maybe append or override content-length and content-type headers using the blob. The spec will clarify what to do:
     // https://github.com/slightlyoff/ServiceWorker/issues/192
     return adoptRef(new Response(blobDataHandle.release(), ResponseInit(responseInit)));
 }
 
 PassRefPtr<HeaderMap> Response::headers() const
@@ skipping 16 matching lines @@
     , m_headers(responseInit.headers)
     , m_blobDataHandle(blobDataHandle)
 {
     ScriptWrappable::init(this);
 
     if (!m_headers)
         m_headers = HeaderMap::create();
 }
 
 } // namespace WebCore