Implement SSL client authentication for Windows....

net/http/http_transaction.h

Index: net/http/http_transaction.h
===================================================================
--- net/http/http_transaction.h	(revision 18321)
+++ net/http/http_transaction.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.
 
@@ -13,6 +13,7 @@
 class HttpRequestInfo;
 class HttpResponseInfo;
 class IOBuffer;
+class X509Certificate;
 
 // Represents a single HTTP transaction (i.e., a single request/response pair).
 // HTTP redirects are not followed and authentication challenges are not
@@ -50,6 +51,10 @@
   //
   virtual int RestartIgnoringLastError(CompletionCallback* callback) = 0;
 
+  // Restarts the HTTP transaction with a client certificate.
+  virtual int RestartWithCertificate(X509Certificate* client_cert,
+                                     CompletionCallback* callback) = 0;
+
   // Restarts the HTTP transaction with authentication credentials.
   virtual int RestartWithAuth(const std::wstring& username,
                               const std::wstring& password,