Implement updated method overriding rules in the vm.

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 */ factory SecureSocket._(RawSecureSocket rawSocket) =>
       new _SecureSocket(rawSocket);
 
   /* patch */ static void initialize({String database,
                                       String password,
                                       bool useBuiltinRoots: true,
                                       bool readOnly: true})
       native "SecureSocket_InitializeLibrary";
 
   /* patch */ static X509Certificate addCertificate(List<int> certificate,
                                                     String trust)
       native "SecureSocket_AddCertificate";
 
   /* patch */ static importCertificatesWithPrivateKeys(List<int> certificates,
                                                        String password)
       native "SecureSocket_ImportCertificatesWithPrivateKeys";
 
   /* patch */ static X509Certificate changeTrust(String nickname,
                                                  String trust)
       native "SecureSocket_ChangeTrust";
 
-  /* patch */ static getCertificate(String nickname)
+  /* patch */ static X509Certificate getCertificate(String nickname)
       native "SecureSocket_GetCertificate";
 
   /* patch */ static removeCertificate(String nickname)
       native "SecureSocket_RemoveCertificate";
 }
 
 
 patch class _SecureFilter {
   /* patch */ factory _SecureFilter() => new _SecureFilterImpl();
 
@@ skipping 85 matching lines @@
       native "SecureSocket_RegisterBadCertificateCallback";
 
   void registerHandshakeCompleteCallback(Function handshakeCompleteHandler)
       native "SecureSocket_RegisterHandshakeCompleteCallback";
 
   // This is a security issue, as it exposes a raw pointer to Dart code.
   int _pointer() native "SecureSocket_FilterPointer";
 
   List<_ExternalBuffer> buffers;
 }