Start adding TLS (SSL) sockets to dart:io.

tests/standalone/io/tls_socket_test.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.
+//
+// VMOptions=
+// VMOptions=--short_socket_read
+// VMOptions=--short_socket_write
+// VMOptions=--short_socket_read --short_socket_write
+
+#import("dart:isolate");
+#import("dart:io");
+
+void main() {
+  // TODO(3593): Use a Dart HTTPS server for this test using TLS server sockets.
+  var tls = new TlsSocket("www.google.dk", 443);
+  String message = '';
+  tls.onConnect = () {
+    var get_list =
+      "GET / HTTP/1.0\r\nHost: www.google.dk\r\n\r\n".charCodes();
+    tls.writeList(get_list, 0, 20);
+    tls.writeList(get_list, 20, get_list.length - 20);
+  };
+  tls.onData = () {
+    var buffer = new List(2000);
+    int len = tls.readList(buffer, 0, 2000);
+    var received = new String.fromCharCodes(buffer.getRange(0, len));
+    message = '$message$received';
+  };
+  tls.onClosed = () {
+    Expect.isTrue(message.contains('</script></body></html>'));
+  };
+}