Add content/browser/loader/ for resource loading related classes.

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_
-
-#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_controller.h"
-#include "googleurl/src/gurl.h"
-
-namespace content {
-
-class ResourceThrottle;
-struct ResourceResponse;
-
-// Used to apply a list of ResourceThrottle instances to an URLRequest.
-class ThrottlingResourceHandler : public LayeredResourceHandler,
-                                  public ResourceController {
- public:
-  // Takes ownership of the ResourceThrottle instances.
-  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,
-                                 ResourceResponse* response,
-                                 bool* defer) OVERRIDE;
-  virtual bool OnWillStart(int request_id, const GURL& url,
-                           bool* defer) OVERRIDE;
-
-  // ResourceThrottleController implementation:
-  virtual void Cancel() OVERRIDE;
-  virtual void CancelAndIgnore() OVERRIDE;
-  virtual void CancelWithError(int error_code) OVERRIDE;
-  virtual void Resume() OVERRIDE;
-
- private:
-  void ResumeStart();
-  void ResumeRedirect();
-  void ResumeResponse();
-
-  enum DeferredStage {
-    DEFERRED_NONE,
-    DEFERRED_START,
-    DEFERRED_REDIRECT,
-    DEFERRED_RESPONSE
-  };
-  DeferredStage deferred_stage_;
-
-  int request_id_;
-
-  ScopedVector<ResourceThrottle> throttles_;
-  size_t index_;
-
-  GURL deferred_url_;
-  scoped_refptr<ResourceResponse> deferred_response_;
-
-  bool cancelled_by_resource_throttle_;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_THROTTLING_RESOURCE_HANDLER_H_