Enable client certificates in SecureSocket and SecureServerSocket

runtime/bin/secure_socket.h

Index: runtime/bin/secure_socket.h
diff --git a/runtime/bin/secure_socket.h b/runtime/bin/secure_socket.h
index 520693af20ba13e0d904c7ae0ed867662823577f..f20ca7d65a75930d60dda594442bfcc6a3b7b919 100644
--- a/runtime/bin/secure_socket.h
+++ b/runtime/bin/secure_socket.h
@@ -74,18 +74,20 @@ class SSLFilter {
   void Connect(const char* host,
                int port,
                bool is_server,
-               const char* certificate_name);
+               const char* certificate_name,
+               bool request_client_certificate,
+               bool require_client_certificate,
+               bool send_client_certificate);
   void Destroy();
   void Handshake();
   void RegisterHandshakeCompleteCallback(Dart_Handle handshake_complete);
   void RegisterBadCertificateCallback(Dart_Handle callback);
+  Dart_Handle bad_certificate_callback() { return bad_certificate_callback_; }
   static void InitializeLibrary(const char* certificate_database,
                                 const char* password,
                                 bool use_builtin_root_certificates);
-
   intptr_t ProcessBuffer(int bufferIndex);
-
-  SECStatus HandleBadCertificate(PRFileDesc* fd);
+  Dart_Handle PeerCertificate();
 
  private:
   static const int kMemioBufferSize = 20 * KB;