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 2bbe8f3adc0442659d97be7dc0442ea78f569f99..038c60f7bbe56075eca20dd8400b16d5c58d9afb 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 adoptRef(new Response(nullptr, ResponseInit(responseInit)));
-}
-
 PassRefPtr<Response> Response::create(Blob* body, const Dictionary& responseInit)
 {
     // FIXME: Maybe append or override content-length and content-type headers using the blob. The spec will clarify what to do: