Add secure sockets to dart:io

runtime/bin/tls_socket_patch.dart

Index: runtime/bin/tls_socket_patch.dart
diff --git a/runtime/bin/tls_socket_patch.dart b/runtime/bin/tls_socket_patch.dart
new file mode 100644
index 0000000000000000000000000000000000000000..f22692e8e1d97ca73d28b556cd121fd2c521b413
--- /dev/null
+++ b/runtime/bin/tls_socket_patch.dart
@@ -0,0 +1,12 @@
+// 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 TlsSocket {
+  /* patch */ factory TlsSocket(String host, int port) {
+    return new _TlsSocket(host, port);
+  }
+
+  /* patch */ static void setCertificateDatabase(String pkcertDirectory)
+      native "TlsSocket_SetCertificateDatabase";
+}