Fix IWYU violators that don't include scoped_ptr.h in Windows build.

net/proxy/dhcp_proxy_script_fetcher_factory.h

 // Copyright (c) 2012 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_
 
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_export.h"
 #include "net/proxy/dhcp_proxy_script_fetcher.h"
 
 namespace net {
 
 class URLRequestContext;
 
 // Factory object for creating the appropriate concrete base class of
@@ skipping 41 matching lines @@
 
  private:
   bool feature_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(DhcpProxyScriptFetcherFactory);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_DHCP_SCRIPT_FETCHER_FACTORY_H_