Cleanup: Remove unneeded forward declararations in net.

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_SCRIPT_ADAPTER_FETCHER_WIN_H_
-#define NET_PROXY_DHCP_SCRIPT_ADAPTER_FETCHER_WIN_H_
+#ifndef NET_PROXY_DHCP_PROXY_SCRIPT_ADAPTER_FETCHER_WIN_H_
+#define NET_PROXY_DHCP_PROXY_SCRIPT_ADAPTER_FETCHER_WIN_H_
 #pragma once
 
+#include <string>
+
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/string16.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/timer.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_export.h"
 #include "googleurl/src/gurl.h"
 
-namespace base {
-class MessageLoopProxy;
-}
-
 namespace net {
 
 class ProxyScriptFetcher;
 class URLRequestContext;
 
 // For a given adapter, this class takes care of first doing a DHCP lookup
 // to get the PAC URL, then if there is one, trying to fetch it.
 class NET_EXPORT_PRIVATE DhcpProxyScriptAdapterFetcher
     : public base::SupportsWeakPtr<DhcpProxyScriptAdapterFetcher>,
       NON_EXPORTED_BASE(public base::NonThreadSafe) {
@@ skipping 140 matching lines @@
   // Implements a timeout on the call to the Win32 DHCP API.
   base::OneShotTimer<DhcpProxyScriptAdapterFetcher> wait_timer_;
 
   scoped_refptr<URLRequestContext> url_request_context_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(DhcpProxyScriptAdapterFetcher);
 };
 
 }  // namespace net
 
-#endif  // NET_PROXY_DHCP_SCRIPT_ADAPTER_FETCHER_WIN_H_
+#endif  // NET_PROXY_DHCP_PROXY_SCRIPT_ADAPTER_FETCHER_WIN_H_