Rename TlsSocket to SecureSocket, and all other Tls... items to Secure....

tests/standalone/io/tls_stream_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
-// The --short_socket_write option does not work with external server
-// www.google.dk.  Add this to the test when we have secure server sockets.
-// See TODO below.
-
-#import("dart:isolate");
-#import("dart:io");
-
-void main() {
-  var testPkcertDatabase =
-      new Path.fromNative(new Options().script).directoryPath.append('pkcert/');
-  TlsSocket.setCertificateDatabase(testPkcertDatabase.toNativePath());
-  // TODO(3593): Use a Dart HTTPS server for this test using TLS server sockets.
-  // When we use a Dart HTTPS server, allow --short_socket_write. The flag
-  // causes fragmentation of the client hello message, which doesn't seem to
-  // work with www.google.dk.
-  var tls = new TlsSocket("www.google.dk", 443);
-  List<String> chunks = <String>[];
-  var input = tls.inputStream;
-  var output = tls.outputStream;
-
-  output.write("GET / HTTP/1.0\r\nHost: www.google.dk\r\n\r\n".charCodes);
-  output.close();
-  input.onData = () {
-    chunks.add(new String.fromCharCodes(input.read()));
-  };
-  input.onClosed = () {
-    String fullPage = Strings.concatAll(chunks);
-    Expect.isTrue(fullPage.contains('</body></html>'));
-  };
-}