Support directories other than "web" in pub build.

sdk/lib/_internal/pub/test/transformer/dart2js/output_can_be_consumed_by_successive_phases.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 'package:scheduled_test/scheduled_test.dart';
-
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 import '../../serve/utils.dart';
 
 /// The code for a transformer that renames ".js" files to ".out".
 const JS_REWRITE_TRANSFORMER = """
 import 'dart:async';
 
 import 'package:barback/barback.dart';
 
@@ skipping 26 matching lines @@
       d.dir("web", [d.file("main.dart", "void main() {}")])
     ]).create();
 
     createLockFile('myapp', pkg: ['barback']);
 
     pubServe();
     requestShouldSucceed("main.dart.out", isUnminifiedDart2JSOutput);
     endPubServe();
   });
 }