Use the new test runner.

test/dart2js/environment_constant_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.
 
+// Dart2js can take a long time to compile dart code, so we increase the timeout
+// to cope with that.
+@Timeout.factor(3)
+
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../serve/utils.dart';
 import '../test_pub.dart';
 
 main() {
-  initConfig();
   group("passes environment constants to dart2js", () {
     setUp(() {
-      // Dart2js can take a long time to compile dart code, so we increase the
-      // timeout to cope with that.
-      currentSchedule.timeout *= 3;
-
       d.dir(appPath, [
         d.appPubspec(),
         d.dir('web', [
           d.file('file.dart',
               'void main() => print(const String.fromEnvironment("name"));')
         ])
       ]).create();
     });
 
     integration('from "pub build"', () {
@@ skipping 27 matching lines @@
 
       pubServe(args: ["--define", "name=fblthp"]);
       requestShouldSucceed("file.dart.js", allOf([
         contains("fblthp"),
         isNot(contains("slartibartfast"))
       ]));
       endPubServe();
     });
   });
 }