Add secure sockets to dart:io

sdk/lib/_internal/compiler/implementation/lib/io_patch.dart

Index: sdk/lib/_internal/compiler/implementation/lib/io_patch.dart
diff --git a/sdk/lib/_internal/compiler/implementation/lib/io_patch.dart b/sdk/lib/_internal/compiler/implementation/lib/io_patch.dart
index f603e87df339088dffde2d1342f72a32fef48637..e06bd1886e035b9beef36f1ed2a4b7f6c19fdbea 100644
--- a/sdk/lib/_internal/compiler/implementation/lib/io_patch.dart
+++ b/sdk/lib/_internal/compiler/implementation/lib/io_patch.dart
@@ -167,6 +167,18 @@ patch class Socket {
   patch factory Socket(String host, int port) => new _Socket(host, port);
 }
 
+patch class TlsSocket {
+  patch static void setCertificateDatabase(String pkcertDirectory) {
+    throw new UnsupportedError("TlsSocket.setCertificateDatabase");
+  }
+}
+
+patch class _TlsFilter {
+  patch factory _TlsFilter() {
+    throw new UnsupportedError("_TlsFilter._TlsFilter");
+  }
+}
+
 patch class _StdIOUtils {
   patch static _getStdioHandle(Socket socket, int num) {
     throw new UnsupportedError("StdIOUtils._getStdioHandle");