Implement THROTTLED priority semantics.

content/browser/loader/resource_handler.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.
 
 #include "content/browser/loader/resource_handler.h"
 
 #include "content/browser/loader/resource_request_info_impl.h"
 
 namespace content {
 
+void ResourceHandler::OnCancel(net::Error net_error, bool* defer) {
+  OnResponseCompleted(net::URLRequestStatus(
+      net::URLRequestStatus::CANCELED, net_error), defer);
+}
+
 ResourceHandler::ResourceHandler(net::URLRequest* request)
     : controller_(NULL),
       request_(request) {
 }
 
 void ResourceHandler::SetController(ResourceController* controller) {
   controller_ = controller;
 }
 
 ResourceRequestInfoImpl* ResourceHandler::GetRequestInfo() const {
   return ResourceRequestInfoImpl::ForRequest(request_);
 }
 
 int ResourceHandler::GetRequestID() const {
   return GetRequestInfo()->GetRequestID();
 }
 
 ResourceMessageFilter* ResourceHandler::GetFilter() const {
   return GetRequestInfo()->filter();
 }
 
 }  // namespace content