Use the new test runner.

test/dart2js/compiles_generated_dart_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.
 
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
 
 main() {
-  initConfig();
   withBarbackVersions("any", () {
     integration("compiles a generated Dart file to JS", () {
       d.dir(appPath, [
         d.pubspec({
           "name": "myapp",
           "version": "0.0.1",
           "transformers": ["myapp/transformer"]
         }),
         d.dir("lib", [
           d.file("transformer.dart", dartTransformer("munge"))
         ]),
         d.dir("web", [
           d.file("main.dart", """
 const TOKEN = "before";
 void main() => print(TOKEN);
 """)
         ])
       ]).create();
 
       createLockFile('myapp', pkg: ['barback']);
 
       pubServe();
       requestShouldSucceed("main.dart.js", contains("(before, munge)"));
       endPubServe();
     });
   });
 }