[ServiceWorker] Make fetch() method better conformance with the spec.

Source/modules/serviceworkers/Request.cpp

Index: Source/modules/serviceworkers/Request.cpp
diff --git a/Source/modules/serviceworkers/Request.cpp b/Source/modules/serviceworkers/Request.cpp
index c9ff1c93066ac4c2d1dfef5d6d10fe02e31e711d..76180b6bb969f52b6c9757dc0cd4f7c589cf93db 100644
--- a/Source/modules/serviceworkers/Request.cpp
+++ b/Source/modules/serviceworkers/Request.cpp
@@ -18,7 +18,6 @@
 #include "platform/network/ResourceRequest.h"
 #include "platform/weborigin/Referrer.h"
 #include "public/platform/WebServiceWorkerRequest.h"
-#include "public/platform/WebURLRequest.h"
 
 namespace blink {
 
@@ -256,15 +255,6 @@ String Request::credentials() const
     return "";
 }
 
-PassOwnPtr<ResourceRequest> Request::createResourceRequest() const
-{
-    OwnPtr<ResourceRequest> request = adoptPtr(new ResourceRequest(url()));
-    request->setRequestContext(blink::WebURLRequest::RequestContextFetch);
-    request->setHTTPMethod("GET");
-    // FIXME: Fill more info.
-    return request.release();
-}
-
 void Request::trace(Visitor* visitor)
 {
     visitor->trace(m_request);