Refactor the guts of ResourceDispatcherHostImpl into a new class named

content/browser/renderer_host/throttling_resource_handler.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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_THROTTLING_RESOURCE_HANDLER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_THROTTLING_RESOURCE_HANDLER_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
 #include "content/browser/renderer_host/layered_resource_handler.h"
-#include "content/public/browser/resource_throttle_controller.h"
+#include "content/public/browser/resource_controller.h"
 #include "googleurl/src/gurl.h"
 
 namespace content {
 
-class ResourceDispatcherHostImpl;
 class ResourceThrottle;
 struct ResourceResponse;
 
 // Used to apply a list of ResourceThrottle instances to an URLRequest.
 class ThrottlingResourceHandler : public LayeredResourceHandler,
-                                  public ResourceThrottleController {
+                                  public ResourceController {
  public:
   // Takes ownership of the ResourceThrottle instances.
-  ThrottlingResourceHandler(ResourceDispatcherHostImpl* host,
-                            scoped_ptr<ResourceHandler> next_handler,
+  ThrottlingResourceHandler(scoped_ptr<ResourceHandler> next_handler,
                             int child_id,
                             int request_id,
                             ScopedVector<ResourceThrottle> throttles);
   virtual ~ThrottlingResourceHandler();
 
   // LayeredResourceHandler overrides:
   virtual bool OnRequestRedirected(int request_id, const GURL& url,
                                    ResourceResponse* response,
                                    bool* defer) OVERRIDE;
   virtual bool OnResponseStarted(int request_id,
@@ skipping 12 matching lines @@
   void ResumeResponse();
 
   enum DeferredStage {
     DEFERRED_NONE,
     DEFERRED_START,
     DEFERRED_REDIRECT,
     DEFERRED_RESPONSE
   };
   DeferredStage deferred_stage_;
 
-  ResourceDispatcherHostImpl* host_;
   int child_id_;
   int request_id_;
 
   ScopedVector<ResourceThrottle> throttles_;
   size_t index_;
 
   GURL deferred_url_;
   scoped_refptr<ResourceResponse> deferred_response_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_THROTTLING_RESOURCE_HANDLER_H_