Remove unnecessary references to URLRequestContext.

net/proxy/dhcp_proxy_script_fetcher_factory.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_SCRIPT_FETCHER_FACTORY_H_
 #define NET_PROXY_DHCP_SCRIPT_FETCHER_FACTORY_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/singleton.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_export.h"
-#include "net/url_request/url_request_context.h"
 
 namespace net {
 
 class DhcpProxyScriptFetcher;
+class URLRequestContext;
 
 // Factory object for creating the appropriate concrete base class of
 // DhcpProxyScriptFetcher for your operating system and settings.
 //
 // You might think we could just implement a DHCP client at the protocol
 // level and have cross-platform support for retrieving PAC configuration
 // from DHCP, but unfortunately the DHCP protocol assumes there is a single
 // client per machine (specifically per network interface card), and there
 // is an implicit state machine between the client and server, so adding a
 // second client to the machine would not be advisable (see e.g. some
@@ skipping 32 matching lines @@
 
  private:
   bool feature_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(DhcpProxyScriptFetcherFactory);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_DHCP_SCRIPT_FETCHER_FACTORY_H_