[ServiceWorker] Set FetchRequestMode and handle wasFetchedViaServiceWorker.

Source/core/loader/DocumentThreadableLoader.h

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013, Intel Corporation
  *
  * 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.
@@ skipping 74 matching lines @@
         void notifyResponseReceived(unsigned long identifier, const ResourceResponse&);
 
         // Methods containing code to handle resource fetch results which is
         // common to both sync and async mode.
         void handleResponse(unsigned long identifier, const ResourceResponse&);
         void handleReceivedData(const char* data, unsigned dataLength);
         void handleSuccessfulFinish(unsigned long identifier, double finishTime);
 
         void didTimeout(Timer<DocumentThreadableLoader>*);
         void makeCrossOriginAccessRequest(const ResourceRequest&);
+        // Loads m_fallbackRequestForServiceWorker.
+        void loadFallbackRequestForServiceWorker();
         // Loads m_actualRequest.
         void loadActualRequest();
         // Clears m_actualRequest and reports access control check failure to
         // m_client.
         void handlePreflightFailure(const String& url, const String& errorDescription);
         // Investigates the response for the preflight request. If successful,
         // the actual request will be made later in handleSuccessfulFinish().
         void handlePreflightResponse(const ResourceResponse&);
 
         void loadRequest(const ResourceRequest&, ResourceLoaderOptions);
@@ skipping 15 matching lines @@
         // with up-to-date values from them and this variable, and use it.
         const ResourceLoaderOptions m_resourceLoaderOptions;
 
         bool m_forceDoNotAllowStoredCredentials;
         RefPtr<SecurityOrigin> m_securityOrigin;
 
         bool m_sameOriginRequest;
         bool m_simpleRequest;
         bool m_async;
 
+        // Holds the original request for fallback in case the Service Worker
+        // does not respond.
+        OwnPtr<ResourceRequest> m_fallbackRequestForServiceWorker;
         // Holds the original request and options for it during preflight
         // request handling phase.
         OwnPtr<ResourceRequest> m_actualRequest;
         OwnPtr<ResourceLoaderOptions> m_actualOptions;
 
         HTTPHeaderMap m_simpleRequestHeaders; // stores simple request headers in case of a cross-origin redirect.
         Timer<DocumentThreadableLoader> m_timeoutTimer;
         double m_requestStartedSeconds; // Time an asynchronous fetch request is started
     };
 
 } // namespace blink
 
 #endif // DocumentThreadableLoader_h