service worker: Clean up fetch event if URLRequest gets cancelled.

content/browser/service_worker/service_worker_fetch_dispatcher.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_FETCH_DISPATCHER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_FETCH_DISPATCHER_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 26 matching lines @@
       const FetchCallback& fetch_callback);
   ~ServiceWorkerFetchDispatcher();
 
   // Dispatches a fetch event to the |version| given in ctor, and fires
   // |fetch_callback| (also given in ctor) when finishes. It runs
   // |prepare_callback| as an intermediate step once the version is activated
   // and running.
   void Run();
 
  private:
+  class ResponseCallback;
+
   void DidWaitForActivation();
   void StartWorker();
   void DidStartWorker();
   void DidFailToStartWorker(ServiceWorkerStatusCode status);
   void DispatchFetchEvent();
   void DidFailToDispatch(ServiceWorkerStatusCode status);
   void DidFail(ServiceWorkerStatusCode status);
   void DidFinish(int request_id,
                  ServiceWorkerFetchEventResult fetch_result,
                  const ServiceWorkerResponse& response);
@@ skipping 11 matching lines @@
   ResourceType resource_type_;
   bool did_complete_;
   base::WeakPtrFactory<ServiceWorkerFetchDispatcher> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerFetchDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_FETCH_DISPATCHER_H_