Use the new test runner.

test/barback/directory_args_test.dart

 // Copyright (c) 2014, 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.
 
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
 
 main() {
-  initConfig();
-
   setUp(() {
     d.dir(appPath, [
       d.appPubspec(),
       d.dir('bar', [d.file('file.txt', 'bar')]),
       d.dir('foo', [d.file('file.txt', 'foo')]),
       d.dir('test', [d.file('file.txt', 'test')]),
       d.dir('web', [d.file('file.txt', 'web')])
     ]).create();
   });
 
@@ skipping 19 matching lines @@
     pubServe(args: ["foo", "bar"]);
 
     requestShouldSucceed("file.txt", "bar", root: "bar");
     requestShouldSucceed("file.txt", "foo", root: "foo");
     expectNotServed("test");
     expectNotServed("web");
 
     endPubServe();
   });
 }