[ServivceWorker] Treat rejecting respondWith as a Network Error

Source/modules/serviceworkers/ServiceWorkerGlobalScopeClient.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 #include "public/platform/WebCallbacks.h"
 #include "public/platform/WebMessagePortChannel.h"
 #include "public/platform/WebServiceWorkerClientsInfo.h"
 #include "public/platform/WebServiceWorkerEventResult.h"
 #include "wtf/Forward.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
 class ExecutionContext;
-class Response;
 class WebServiceWorkerCacheStorage;
+class WebServiceWorkerResponse;
 class WebURL;
 class WorkerClients;
 
 class ServiceWorkerGlobalScopeClient : public WillBeHeapSupplement<WorkerClients> {
     WTF_MAKE_NONCOPYABLE(ServiceWorkerGlobalScopeClient);
 public:
     virtual ~ServiceWorkerGlobalScopeClient() { }
 
     virtual void getClients(WebServiceWorkerClientsCallbacks*) = 0;
     virtual WebURL scope() const = 0;
     virtual WebServiceWorkerCacheStorage* cacheStorage() const = 0;
 
     virtual void didHandleActivateEvent(int eventID, WebServiceWorkerEventResult) = 0;
     virtual void didHandleInstallEvent(int installEventID, WebServiceWorkerEventResult) = 0;
-    // A null response means no valid response was provided by the service worker, so fallback to native.
-    virtual void didHandleFetchEvent(int fetchEventID, Response* = 0) = 0;
+    // Calling didHandleFetchEvent without response means no response was
+    // provided by the service worker in the fetch events, so fallback to native.
+    virtual void didHandleFetchEvent(int fetchEventID) = 0;
+    virtual void didHandleFetchEvent(int fetchEventID, const WebServiceWorkerResponse&) = 0;
     virtual void didHandleSyncEvent(int syncEventID) = 0;
     virtual void postMessageToClient(int clientID, const WebString& message, PassOwnPtr<WebMessagePortChannelArray>) = 0;
 
     static const char* supplementName();
     static ServiceWorkerGlobalScopeClient* from(ExecutionContext*);
 
 protected:
     ServiceWorkerGlobalScopeClient() { }
 };
 
 void provideServiceWorkerGlobalScopeClientToWorker(WorkerClients*, PassOwnPtrWillBeRawPtr<ServiceWorkerGlobalScopeClient>);
 
 } // namespace blink
 
 #endif // ServiceWorkerGlobalScopeClient_h