Teach CrOS's OfflineResourceThrottle about ServiceWorkers so it know longer presents its offline in…

chrome/browser/renderer_host/offline_resource_throttle.h

 // Copyright (c) 2012 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 CHROME_BROWSER_RENDERER_HOST_OFFLINE_RESOURCE_THROTTLE_H_
 #define CHROME_BROWSER_RENDERER_HOST_OFFLINE_RESOURCE_THROTTLE_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 16 matching lines @@
  public:
   OfflineResourceThrottle(net::URLRequest* request,
                           content::AppCacheService* appcache_service);
   virtual ~OfflineResourceThrottle();
 
   // content::ResourceThrottle implementation:
   virtual void WillStartRequest(bool* defer) override;
   virtual const char* GetNameForLogging() const override;
 
  private:
-  // OfflineLoadPage callback.
   void OnBlockingPageComplete(bool proceed);
-
-  // Erase the state associated with a deferred load request.
   void ClearRequestInfo();
   bool IsRemote(const GURL& url) const;
-
-  // True if chrome should show the offline page.
   bool ShouldShowOfflinePage(const GURL& url) const;
-
-  // A callback to tell if an appcache exists.
   void OnCanHandleOfflineComplete(int rv);
 
   net::URLRequest* request_;
   // Safe to keep a pointer around since AppCacheService outlives all requests.
   content::AppCacheService* appcache_service_;
-  net::CancelableCompletionCallback appcache_completion_callback_;
+  net::CancelableCompletionCallback completion_callback_;
+  int pending_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflineResourceThrottle);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_OFFLINE_RESOURCE_THROTTLE_H_