Fix a race condition where rapid back/forward clicks could close a tab...

chrome/browser/renderer_host/resource_dispatcher_host.h

 // Copyright (c) 2006-2008 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 fowards 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 22 matching lines @@
 class DownloadRequestManager;
 class LoginHandler;
 class MessageLoop;
 class PluginService;
 class SafeBrowsingService;
 class SaveFileManager;
 class SSLClientAuthHandler;
 class URLRequestContext;
 class WebKitThread;
 struct ViewHostMsg_Resource_Request;
+struct ViewMsg_ClosePage_Params;
 
 class ResourceDispatcherHost : public URLRequest::Delegate {
  public:
   // Implemented by the client of ResourceDispatcherHost to receive messages in
   // response to a resource load.  The messages are intended to be forwarded to
   // the ResourceDispatcher in the child process via an IPC channel that the
   // client manages.
   //
   // NOTE: This class unfortunately cannot be named 'Delegate' because that
   // conflicts with the name of ResourceDispatcherHost's base class.
@@ skipping 238 matching lines @@
     return safe_browsing_;
   }
 
   WebKitThread* webkit_thread() const {
     return webkit_thread_.get();
   }
 
   MessageLoop* ui_loop() const { return ui_loop_; }
 
   // Called when the onunload handler for a cross-site request has finished.
-  void OnClosePageACK(int process_id, int request_id);
+  void OnClosePageACK(const ViewMsg_ClosePage_Params& params);
 
   // Force cancels any pending requests for the given process.
   void CancelRequestsForProcess(int process_id);
 
   // Force cancels any pending requests for the given route id.  This method
   // acts like CancelRequestsForProcess when route_id is -1.
   void CancelRequestsForRoute(int process_id, int route_id);
 
   // URLRequest::Delegate
   virtual void OnReceivedRedirect(URLRequest* request,
@@ skipping 263 matching lines @@
   // Used during IPC message dispatching so that the handlers can get a pointer
   // to the source of the message.
   Receiver* receiver_;
 
   static bool g_is_http_prioritization_enabled;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHost);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RESOURCE_DISPATCHER_HOST_H_