Enable client certificates in SecureSocket and SecureServerSocket

runtime/bin/secure_socket_patch.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 patch class SecureSocket {
   /* patch */ static void initialize({String database,
                                       String password,
                                       bool useBuiltinRoots: true})
   native "SecureSocket_InitializeLibrary";
 }
@@ skipping 19 matching lines @@
   _SecureFilterImpl() {
     buffers = new List<_ExternalBuffer>(_SecureSocket.NUM_BUFFERS);
     for (int i = 0; i < _SecureSocket.NUM_BUFFERS; ++i) {
       buffers[i] = new _ExternalBuffer();
     }
   }
 
   void connect(String hostName,
                int port,
                bool is_server,
-               String certificate_name) native "SecureSocket_Connect";
+               String certificateName,
+               bool requestClientCertificate,
+               bool requireClientCertificate,
+               bool sendClientCertificate) native "SecureSocket_Connect";
 
   void destroy() {
     buffers = null;
     _destroy();
   }
 
   void _destroy() native "SecureSocket_Destroy";
 
   void handshake() native "SecureSocket_Handshake";
 
   void init() native "SecureSocket_Init";
 
+  X509Certificate get peerCertificate native "SecureSocket_PeerCertificate";
+
   int processBuffer(int bufferIndex) native "SecureSocket_ProcessBuffer";
 
   void registerBadCertificateCallback(Function callback)
       native "SecureSocket_RegisterBadCertificateCallback";
 
   void registerHandshakeCompleteCallback(Function handshakeCompleteHandler)
       native "SecureSocket_RegisterHandshakeCompleteCallback";
 
   List<_ExternalBuffer> buffers;
 }