Implement SSL client authentication for Windows....

net/base/ssl_client_socket_mac.h

Index: net/base/ssl_client_socket_mac.h
===================================================================
--- net/base/ssl_client_socket_mac.h	(revision 18321)
+++ net/base/ssl_client_socket_mac.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2006-2009 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.
 
@@ -31,6 +31,7 @@
 
   // SSLClientSocket methods:
   virtual void GetSSLInfo(SSLInfo* ssl_info);
+  virtual void GetSSLCertRequestInfo(SSLCertRequestInfo* cert_request_info);
 
   // ClientSocket methods:
   virtual int Connect(CompletionCallback* callback);