Use WebURLResponse to pass the navigation preload response from SWContextClient to FetchEvent.

third_party/WebKit/Source/modules/serviceworkers/FetchEvent.h

Index: third_party/WebKit/Source/modules/serviceworkers/FetchEvent.h
diff --git a/third_party/WebKit/Source/modules/serviceworkers/FetchEvent.h b/third_party/WebKit/Source/modules/serviceworkers/FetchEvent.h
index b2a15213ab408bd52e6e5fa90a667cbae06a91a0..bddd967fd036cd793c3e3d8a72018c978975957d 100644
--- a/third_party/WebKit/Source/modules/serviceworkers/FetchEvent.h
+++ b/third_party/WebKit/Source/modules/serviceworkers/FetchEvent.h
@@ -25,7 +25,7 @@ class RespondWithObserver;
 class ScriptState;
 class WebDataConsumerHandle;
 struct WebServiceWorkerError;
-class WebServiceWorkerResponse;
+class WebURLResponse;
 
 // A fetch event is dispatched by the client to a service worker's script
 // context. RespondWithObserver can be used to notify the client about the
@@ -55,7 +55,7 @@ class MODULES_EXPORT FetchEvent final : public ExtendableEvent {
   ScriptPromise preloadResponse(ScriptState*);
 
   void onNavigationPreloadResponse(ScriptState*,
-                                   std::unique_ptr<WebServiceWorkerResponse>,
+                                   std::unique_ptr<WebURLResponse>,
                                    std::unique_ptr<WebDataConsumerHandle>);
   void onNavigationPreloadError(ScriptState*,
                                 std::unique_ptr<WebServiceWorkerError>);