Use defer out-params instead of ResourceDispatcherHostImpl::PauseRequest(...true)

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 118 matching lines @@
   // has_new_first_party_for_cookies, and new_first_party_for_cookies will not
   // be used.
   void FollowDeferredRedirect(int child_id,
                               int request_id,
                               bool has_new_first_party_for_cookies,
                               const GURL& new_first_party_for_cookies);
 
   // Starts a request that was deferred during ResourceHandler::OnWillStart().
   void StartDeferredRequest(int child_id, int request_id);
 
+  // Resumes network activity for a particular request.
+  void ResumeDeferredRequest(int child_id, int request_id);
+
   // Returns true if it's ok to send the data. If there are already too many
   // data messages pending, it pauses the request and returns false. In this
   // case the caller should not send the data.
   bool WillSendData(int child_id, int request_id);
 
-  // Pauses or resumes network activity for a particular request.
-  void PauseRequest(int child_id, int request_id, bool pause);
-
   // Returns the number of pending requests. This is designed for the unittests
   int pending_requests() const {
     return static_cast<int>(pending_requests_.size());
   }
 
   // Intended for unit-tests only. Returns the memory cost of all the
   // outstanding requests (pending and blocked) for |child_id|.
   int GetOutstandingRequestsMemoryCost(int child_id) const;
 
   // Intended for unit-tests only. Overrides the outstanding requests bound.
@@ skipping 100 matching lines @@
       net::URLRequest* request,
       ResourceContext* context,
       int child_id,
       int route_id,
       int request_id,
       bool is_content_initiated,
       const DownloadSaveInfo& save_info,
       const DownloadResourceHandler::OnStartedCallback& started_cb);
 
  private:
+  friend class ResourceDispatcherHostTest;
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            TestBlockedRequestsProcessDies);
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            IncrementOutstandingRequestsMemoryCost);
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            CalculateApproximateMemoryCost);
 
   class ShutdownTask;
 
   friend class ShutdownTask;
 
   // Extracts the render view/process host's identifiers from the given request
   // 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();
 
   void StartRequest(net::URLRequest* request);
 
   // Returns true if the request is paused.
   bool PauseRequestIfNeeded(ResourceRequestInfoImpl* info);
 
+  // Pause or resume network activity for a particular request.
+  void PauseRequest(int child_id, int request_id, bool pause);
+
   // 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);
 
   // Reads data from the response using our internal buffer as async IO.
   // Returns true if data is available immediately, false otherwise.  If the
   // return value is false, we will receive a OnReadComplete() callback later.
   bool Read(net::URLRequest* request, int* bytes_read);
@@ skipping 214 matching lines @@
   // http://crbug.com/90971 - Assists in tracking down use-after-frees on
   // shutdown.
   std::set<const ResourceContext*> active_resource_contexts_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RESOURCE_DISPATCHER_HOST_IMPL_H_