Use the new test runner.

test/run/displays_transformer_logs_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 '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 const SCRIPT = """
 import "package:myapp/lib.dart";
 main() {
@@ skipping 27 matching lines @@
   }
 
   void declareOutputs(DeclaringTransform transform) {
     // TODO(rnystrom): Remove this when #19408 is fixed.
     transform.declareOutput(transform.primaryId);
   }
 }
 """;
 
 main() {
-  initConfig();
   withBarbackVersions("any", () {
     integration('displays transformer log messages', () {
       d.dir(appPath, [
         d.pubspec({
           "name": "myapp",
           "transformers": ["myapp/src/transformer"]
         }),
         d.dir("lib", [
           d.file("lib.dart", LIB),
           d.dir("src", [
@@ skipping 22 matching lines @@
       pub.stdout.expect("myapp|lib/lib.dart.");
 
       pub.stderr.expect("[Warning from Logging]:");
       pub.stderr.expect("myapp|lib/lib.dart.");
 
       pub.stdout.expect("lib");
       pub.shouldExit();
     });
   });
 }