Remove the concept of threading from ProxyService, and move it into the Proxy...

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 <string>
+
+#include "googleurl/src/gurl.h"
 #include "net/proxy/proxy_resolver.h"
 
 typedef void* 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();
+  virtual ~ProxyResolverWinHttp();
 
   // ProxyResolver implementation:
-  virtual int GetProxyForURL(const GURL& query_url,
-                             const GURL& pac_url,
-                             ProxyInfo* results);
+  virtual int GetProxyForURL(const GURL& url,
+                             ProxyInfo* results,
+                             CompletionCallback* /*callback*/,
+                             RequestHandle* /*request*/);
+  virtual void CancelRequest(RequestHandle request);
 
  private:
-   bool OpenWinHttpSession();
-   void CloseWinHttpSession();
+  // ProxyResolver implementation:
+  virtual void SetPacScriptByUrlInternal(const GURL& pac_url);
+
+  bool OpenWinHttpSession();
+  void CloseWinHttpSession();
 
   // Proxy configuration is cached on the session handle.
   HINTERNET session_handle_;
 
+  GURL pac_url_;
+
   DISALLOW_COPY_AND_ASSIGN(ProxyResolverWinHttp);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_RESOLVER_WINHTTP_H_