Refactor the guts of ResourceDispatcherHostImpl into a new class named

chrome/browser/download/download_resource_throttle.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 "chrome/browser/download/download_resource_throttle.h"
 
 #include "base/bind.h"
 #include "chrome/browser/download/download_util.h"
-#include "content/public/browser/resource_throttle_controller.h"
+#include "content/public/browser/resource_controller.h"
 
 DownloadResourceThrottle::DownloadResourceThrottle(
     DownloadRequestLimiter* limiter,
     int render_process_id,
     int render_view_id,
     int request_id,
     const std::string& request_method)
     : querying_limiter_(true),
       request_allowed_(false),
       request_deferred_(false) {
@@ skipping 50 matching lines @@
 
   if (request_deferred_) {
     request_deferred_ = false;
     if (allow) {
       controller()->Resume();
     } else {
       controller()->Cancel();
     }
   }
 }