ServiceWorker: Add layout tests for fetch event response

Source/modules/serviceworkers/Response.cpp

Index: Source/modules/serviceworkers/Response.cpp
diff --git a/Source/modules/serviceworkers/Response.cpp b/Source/modules/serviceworkers/Response.cpp
index 5f4596bddf0c2269c78c127dd27ab4f160c55eb7..4a95d7da4590c9bb35efdf4007fbdd5002baf531 100644
--- a/Source/modules/serviceworkers/Response.cpp
+++ b/Source/modules/serviceworkers/Response.cpp
@@ -13,12 +13,6 @@
 
 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;