Pages controlled by ServiceWorkers should not participate in AppCaching

content/browser/appcache/appcache_interceptor.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_APPCACHE_APPCACHE_INTERCEPTOR_H_
 #define CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
 
 #include "base/memory/singleton.h"
 #include "content/common/content_export.h"
 #include "content/public/common/resource_type.h"
 #include "net/url_request/url_request.h"
+#include "net/url_request/url_request_interceptor.h"
 #include "url/gurl.h"
 
 namespace content {
 class AppCacheRequestHandler;
 class AppCacheServiceImpl;
 
 // An interceptor to hijack requests and potentially service them out of
 // the appcache.
 class CONTENT_EXPORT AppCacheInterceptor
     : public net::URLRequest::Interceptor {
@@ skipping 19 matching lines @@
 
   // Methods to support cross site navigations.
   static void PrepareForCrossSiteTransfer(net::URLRequest* request,
                                           int old_process_id);
   static void CompleteCrossSiteTransfer(net::URLRequest* request,
                                         int new_process_id,
                                         int new_host_id);
 
   static AppCacheInterceptor* GetInstance();
 
+  // The appcache system employs two different interceptors. The singleton
+  // AppCacheInterceptor derives URLRequest::Interceptor and is used
+  // to hijack request handling upon receipt of the response or a redirect.
+  // A separate URLRequestInterceptor derivative is used to hijack handling
+  // at the very start of request processing. The separate handler allows the
+  // content lib to order its collection of net::URLRequestInterceptors.
+  static scoped_ptr<net::URLRequestInterceptor> CreateStartInterceptor();
+
  protected:
   // Override from net::URLRequest::Interceptor:
   virtual net::URLRequestJob* MaybeIntercept(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate) override;
   virtual net::URLRequestJob* MaybeInterceptResponse(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate) override;
   virtual net::URLRequestJob* MaybeInterceptRedirect(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate,
       const GURL& location) override;
 
  private:
   friend struct DefaultSingletonTraits<AppCacheInterceptor>;
+  class StartInterceptor;
 
   AppCacheInterceptor();
   virtual ~AppCacheInterceptor();
 
   static void SetHandler(net::URLRequest* request,
                          AppCacheRequestHandler* handler);
   static AppCacheRequestHandler* GetHandler(net::URLRequest* request);
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheInterceptor);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_