Split ProxyResolver into two interfaces:...

net/proxy/proxy_resolver_winhttp.h

 // Copyright (c) 2006-2008 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_PROXY_RESOLVER_WINHTTP_H_
 #define NET_PROXY_PROXY_RESOLVER_WINHTTP_H_
 
 #include "net/proxy/proxy_service.h"
 
 typedef LPVOID HINTERNET;  // From winhttp.h
 
 namespace net {
 
 // An implementation of ProxyResolver that uses WinHTTP and the system
 // proxy settings.
 class ProxyResolverWinHttp : public ProxyResolver {
  public:
   ProxyResolverWinHttp();
   ~ProxyResolverWinHttp();
 
   // ProxyResolver implementation:
-  virtual int GetProxyConfig(ProxyConfig* config);
   virtual int GetProxyForURL(const GURL& query_url,
                              const GURL& pac_url,
                              ProxyInfo* results);
 
  private:
    bool OpenWinHttpSession();
    void CloseWinHttpSession();
 
   // Proxy configuration is cached on the session handle.
   HINTERNET session_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyResolverWinHttp);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_RESOLVER_WINHTTP_H_