Remove unnecessary references to URLRequestContext.

net/proxy/dhcp_proxy_script_adapter_fetcher_win.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 NET_PROXY_DHCP_PROXY_SCRIPT_ADAPTER_FETCHER_WIN_H_
 #define NET_PROXY_DHCP_PROXY_SCRIPT_ADAPTER_FETCHER_WIN_H_
 #pragma once
 
 #include <string>
 
@@ skipping 149 matching lines @@
   // Callback to let our client know we're done. Invalid in states
   // START, FINISH and CANCEL.
   net::CompletionCallback callback_;
 
   // Fetcher to retrieve PAC files once URL is known.
   scoped_ptr<ProxyScriptFetcher> script_fetcher_;
 
   // Implements a timeout on the call to the Win32 DHCP API.
   base::OneShotTimer<DhcpProxyScriptAdapterFetcher> wait_timer_;
 
-  scoped_refptr<URLRequestContext> url_request_context_;
+  URLRequestContext* const url_request_context_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(DhcpProxyScriptAdapterFetcher);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_DHCP_PROXY_SCRIPT_ADAPTER_FETCHER_WIN_H_