Remove is_prerender() from ChromeURLRequestUserData since it's not used anymore.

chrome/browser/renderer_host/chrome_url_request_user_data.h

-// Copyright (c) 2011 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_RENDERER_HOST_CHROME_URL_REQUEST_USER_DATA_H_
-#define CHROME_BROWSER_RENDERER_HOST_CHROME_URL_REQUEST_USER_DATA_H_
-
-#include "base/supports_user_data.h"
-
-namespace net {
-class URLRequest;
-}
-
-class ChromeURLRequestUserData : public base::SupportsUserData::Data {
- public:
-  bool is_prerender() const { return is_prerender_; }
-  void set_is_prerender(bool is_prerender) { is_prerender_ = is_prerender; }
-
-  // Creates a new ChromeURLRequestUserData instance and attaches it
-  // to |request|. |request| must not have an existing ChromeURLRequestUserData
-  // instance attached to it, and must be non-NULL. The returned instance
-  // is owned by |request|.
-  static ChromeURLRequestUserData* Create(net::URLRequest* request);
-
-  // Delete the ChromeURLRequestUserData from a |request|. |request| must be
-  // non-NULL.
-  static void Delete(net::URLRequest* request);
-
-  // Gets the ChromeURLRequestUserData instance attached to |request|, or
-  // returns NULL if one is not attached. |request| must be non-NULL.
-  static ChromeURLRequestUserData* Get(const net::URLRequest* request);
-
- private:
-  ChromeURLRequestUserData();
-
-  bool is_prerender_;
-
-  DISALLOW_COPY_AND_ASSIGN(ChromeURLRequestUserData);
-};
-
-#endif  // CHROME_BROWSER_RENDERER_HOST_CHROME_URL_REQUEST_USER_DATA_H_