Use the new test runner.

test/serve/native_watch_replaced_file_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS d.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.
 
 library pub_tests;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:path/path.dart' as p;
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import 'utils.dart';
 
 main() {
   // This is a regression test for http://dartbug.com/21402.
-  initConfig();
   withBarbackVersions("any", () {
     integration("picks up files replaced after serving started when using the "
         "native watcher", () {
       d.dir(appPath, [
         d.pubspec({
           "name": "myapp",
           "transformers": ["myapp/src/transformer"]
         }),
         d.dir("lib", [d.dir("src", [
           d.file("transformer.dart", REWRITE_TRANSFORMER)
@@ skipping 19 matching lines @@
       // Read the transformed file to ensure the change is actually noticed by
       // pub and not that we just get the new file contents piped through
       // without pub realizing they've changed.
       waitForBuildSuccess();
       requestShouldSucceed("file.out", "after.out");
 
       endPubServe();
     });
   });
 }