Safely cancel prerenders on threads other than the UI thread

content/browser/renderer_host/resource_dispatcher_host.h

 // Copyright (c) 2011 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.
 
 // This is the browser side of the resource dispatcher, it receives requests
 // from the child process (i.e. [Renderer, Plugin, Worker]ProcessHost), and
 // dispatches them to URLRequests. It then forwards the messages from the
 // URLRequests back to the correct process for handling.
 //
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
@@ skipping 226 matching lines @@
   void UnregisterDownloadedTempFile(int child_id, int request_id);
 
   // Needed for the sync IPC message dispatcher macros.
   bool Send(IPC::Message* message);
 
   // Controls if we launch or squash prefetch requests as they arrive
   // from renderers.
   static bool is_prefetch_enabled();
   static void set_is_prefetch_enabled(bool value);
 
-  void AddPrerenderChildRoutePair(int child_id, int route_id);
-  void RemovePrerenderChildRoutePair(int child_id, int route_id);
-
-  typedef std::set<std::pair<int, int> > PrerenderChildRouteIdPairs;
-  const PrerenderChildRouteIdPairs& prerender_child_route_id_pairs() const {
-    return prerender_child_route_pairs_;
-  }
-
  private:
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            TestBlockedRequestsProcessDies);
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            IncrementOutstandingRequestsMemoryCost);
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            CalculateApproximateMemoryCost);
 
   class ShutdownTask;
 
@@ skipping 112 matching lines @@
                     int route_id);  // only valid for async
   void OnDataReceivedACK(int request_id);
   void OnDataDownloadedACK(int request_id);
   void OnUploadProgressACK(int request_id);
   void OnCancelRequest(int request_id);
   void OnFollowRedirect(int request_id,
                         bool has_new_first_party_for_cookies,
                         const GURL& new_first_party_for_cookies);
   void OnReleaseDownloadedFile(int request_id);
 
-  bool IsPrerenderingChildRoutePair(int child_id, int route_id) const;
-
   ResourceHandler* CreateSafeBrowsingResourceHandler(
       ResourceHandler* handler, int child_id, int route_id,
       ResourceType::Type resource_type);
 
   // Creates ResourceDispatcherHostRequestInfo for a browser-initiated request
   // (a download or a page save). |download| should be true if the request
   // is a file download.
   ResourceDispatcherHostRequestInfo* CreateRequestInfoForBrowserRequest(
       ResourceHandler* handler,
       int child_id,
@@ skipping 81 matching lines @@
   // The total number of outstanding requests is roughly:
   //   (max_outstanding_requests_cost_per_process_ /
   //       kAvgBytesPerOutstandingRequest)
   int max_outstanding_requests_cost_per_process_;
 
   // Used during IPC message dispatching so that the handlers can get a pointer
   // to the source of the message.
   ResourceMessageFilter* filter_;
 
   static bool is_prefetch_enabled_;
-  PrerenderChildRouteIdPairs prerender_child_route_pairs_;
 
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHost);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RESOURCE_DISPATCHER_HOST_H_