Fixing a problem, where a hung renderer process is not killed when navigating away

content/browser/renderer_host/resource_dispatcher_host_impl.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.
 
 // 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 146 matching lines @@
     return download_file_manager_;
   }
 
   SaveFileManager* save_file_manager() const {
     return save_file_manager_;
   }
 
   // Called when the unload handler for a cross-site request has finished.
   void OnSwapOutACK(const ViewMsg_SwapOut_Params& params);
 
+  // Called when we want to simulate the renderer process sending
+  // ViewHostMsg_SwapOut_ACK in cases where the renderer has died or is
+  // unresponsive.
+  void OnSimulateSwapOutACK(const ViewMsg_SwapOut_Params& params);
+
   // Called when the renderer loads a resource from its internal cache.
   void OnDidLoadResourceFromMemoryCache(const GURL& url,
                                         const std::string& security_info,
                                         const std::string& http_method,
                                         ResourceType::Type resource_type);
 
   // Force cancels any pending requests for the given process.
   void CancelRequestsForProcess(int child_id);
 
   // Force cancels any pending requests for the given route id.  This method
@@ skipping 92 matching lines @@
   // and places them in the given out params (both required). If there are no
   // such IDs associated with the request (such as non-page-related requests),
   // this function will return false and both out params will be -1.
   static bool RenderViewForRequest(const net::URLRequest* request,
                                    int* render_process_host_id,
                                    int* render_view_host_id);
 
   // A shutdown helper that runs on the IO thread.
   void OnShutdown();
 
+  // The real implementation of the OnSwapOutACK logic. Public methods call
+  // this method with the proper value for the timed_out parameter.
+  void HandleSwapOutACK(const ViewMsg_SwapOut_Params& params, bool timed_out);
+
   void StartRequest(net::URLRequest* request);
 
   // Returns true if the request is paused.
   bool PauseRequestIfNeeded(ResourceRequestInfoImpl* info);
 
   // Resumes the given request by calling OnResponseStarted or OnReadCompleted.
   void ResumeRequest(const GlobalRequestID& request_id);
 
   // Internal function to start reading for the first time.
   void StartReading(net::URLRequest* request);
@@ skipping 212 matching lines @@
   // to the respective request.
   typedef std::map<GlobalRequestID, net::URLRequest*> TransferredNavigations;
   TransferredNavigations transferred_navigations_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RESOURCE_DISPATCHER_HOST_IMPL_H_