Remove PrerenderResourceThrottle and related infrastructure.

chrome/browser/prerender/prerender_resource_throttle.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 CHROME_BROWSER_PRERENDER_PRERENDER_RESOURCE_THROTTLE_H_
-#define CHROME_BROWSER_PRERENDER_PRERENDER_RESOURCE_THROTTLE_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/weak_ptr.h"
-#include "content/public/browser/resource_throttle.h"
-
-namespace net {
-class URLRequest;
-}
-
-namespace prerender {
-class PrerenderTracker;
-
-class PrerenderResourceThrottle
-    : public content::ResourceThrottle,
-      public base::SupportsWeakPtr<PrerenderResourceThrottle> {
- public:
-  PrerenderResourceThrottle(PrerenderTracker* prerender_tracker,
-                            const net::URLRequest* request,
-                            int child_id,
-                            int route_id);
-
-  // content::ResourceThrottle implementation:
-  virtual void WillStartRequest(bool* defer) OVERRIDE;
-
- private:
-  virtual ~PrerenderResourceThrottle();
-
-  void ContinueRequest(bool proceed);
-
-  PrerenderTracker* prerender_tracker_;
-  const net::URLRequest* request_;
-  int child_id_;
-  int route_id_;
-
-  DISALLOW_COPY_AND_ASSIGN(PrerenderResourceThrottle);
-};
-
-}  // namespace prerender
-
-#endif  // CHROME_BROWSER_PRERENDER_PRERENDER_RESOURCE_THROTTLE_H_