Substitute ResourceHandlers with dummy ResourceHandler while request is transferred

content/browser/renderer_host/resource_dispatcher_host.cc

 // 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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/browser/renderer_host/resource_dispatcher_host.h"
 
 #include <set>
 #include <vector>
@@ skipping 17 matching lines @@
 #include "content/browser/cross_site_request_manager.h"
 #include "content/browser/download/download_file_manager.h"
 #include "content/browser/download/download_id_factory.h"
 #include "content/browser/download/download_resource_handler.h"
 #include "content/browser/download/save_file_manager.h"
 #include "content/browser/download/save_file_resource_handler.h"
 #include "content/browser/plugin_service_impl.h"
 #include "content/browser/renderer_host/async_resource_handler.h"
 #include "content/browser/renderer_host/buffered_resource_handler.h"
 #include "content/browser/renderer_host/cross_site_resource_handler.h"
+#include "content/browser/renderer_host/paused_resource_handler.h"
 #include "content/browser/renderer_host/redirect_to_file_resource_handler.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/renderer_host/resource_dispatcher_host_login_delegate.h"
 #include "content/browser/renderer_host/resource_dispatcher_host_request_info.h"
 #include "content/browser/renderer_host/resource_message_filter.h"
 #include "content/browser/renderer_host/resource_queue.h"
 #include "content/browser/renderer_host/resource_request_details.h"
 #include "content/browser/renderer_host/sync_resource_handler.h"
 #include "content/browser/resource_context.h"
@@ skipping 2190 matching lines @@
 bool ResourceDispatcherHost::allow_cross_origin_auth_prompt() {
   return allow_cross_origin_auth_prompt_;
 }
 
 void ResourceDispatcherHost::set_allow_cross_origin_auth_prompt(bool value) {
   allow_cross_origin_auth_prompt_ = value;
 }
 
 void ResourceDispatcherHost::MarkAsTransferredNavigation(
     const GlobalRequestID& transferred_request_id,
-    net::URLRequest* ransferred_request) {
-  transferred_navigations_[transferred_request_id] = ransferred_request;
+    net::URLRequest* transferred_request) {
+  transferred_navigations_[transferred_request_id] = transferred_request;
+
+  // If a URLRequest is transferred to a new RenderViewHost, its
+  // ResourceHandlers should not receive any notifications because they may
+  // depend on the state of the old RVH. We set a ResourceHandler that allows
+  // canceling requests, because on shutdown of the RDH all pending requests are
+  // canceled. The RVH of requests that are being transferred may be gone by
+  // that time.
+  ResourceDispatcherHostRequestInfo* info = InfoForRequest(transferred_request);
+  scoped_refptr<ResourceHandler> paused_resource_handler(
+      new PausedResourceHandler(info->resource_handler()));
+  info->set_resource_handler(paused_resource_handler.get());
 }
 
 bool ResourceDispatcherHost::IsTransferredNavigation(
     const content::GlobalRequestID& transferred_request_id) const {
   return transferred_navigations_.find(transferred_request_id) !=
       transferred_navigations_.end();
 }