Add in-process http server to the dart test scripts.

pkg/intl/test/start_web_server.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.
-
-/**
- * This file starts a trivial HTTP server to serve locale data files. We start
- * it as a separate process, then terminate so that the test can continue to
- * run. See web_server.dart for more information.
- */
-
-#import("dart:io");
-#import("dart:isolate");
-
-main() {
-  var thisDir = new File(new Options().script).directorySync();
-  var serverPath = "${thisDir.path}/web_server.dart";
-  // TODO(alanknight): This uses nohup and & to stop the child process from
-  // stopping when we exit. This won't work on Windows.
-  var p = Process.start(
-      "nohup",
-      [new Options().executable, serverPath, "&"]);
-  p.onExit = (p) => print("Exited abnormally with exit code: $p");
-  // Give the other process a moment to fully start, and give us a meaningful
-  // exit code if there's an abnormal exit, before we finish.
-  new Timer(1000, (t) => exit(0));
-}