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

chrome/browser/renderer_host/chrome_url_request_user_data.cc

-// 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.
-
-#include "chrome/browser/renderer_host/chrome_url_request_user_data.h"
-
-#include "net/url_request/url_request.h"
-
-namespace {
-
-const char* const kKeyName = "chrome_url_request_user_data";
-
-}  // namespace
-
-ChromeURLRequestUserData::ChromeURLRequestUserData()
-    : is_prerender_(false) {
-}
-
-// static
-ChromeURLRequestUserData* ChromeURLRequestUserData::Get(
-    const net::URLRequest* request) {
-  DCHECK(request);
-  return static_cast<ChromeURLRequestUserData*>(request->GetUserData(kKeyName));
-}
-
-// static
-ChromeURLRequestUserData* ChromeURLRequestUserData::Create(
-    net::URLRequest* request) {
-  DCHECK(request);
-  DCHECK(!Get(request));
-  ChromeURLRequestUserData* user_data = new ChromeURLRequestUserData();
-  request->SetUserData(kKeyName, user_data);
-  return user_data;
-}
-
-// static
-void ChromeURLRequestUserData::Delete(net::URLRequest* request) {
-  DCHECK(request);
-  request->SetUserData(kKeyName, NULL);
-}