Use the new test runner.

test/transformer/loads_a_diamond_transformer_dependency_graph_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 '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
 
 main() {
-  initConfig();
   withBarbackVersions("any", () {
     integration("loads a diamond transformer dependency graph", () {
       d.dir("top", [
         d.pubspec({
           "name": "top",
           "version": "1.0.0"
         }),
         d.dir("lib", [
           d.file("transformer.dart", dartTransformer('top')),
         ])
@@ skipping 49 matching lines @@
           pkg: ['barback']);
 
       pubServe();
       requestShouldSucceed("main.dart",
           'const TOKEN = "(((main.dart, (left, top)), (right, top)), ((myapp, '
           '(left, top)), (right, top)))";');
       endPubServe();
     });
   });
 }