Support directories other than "web" in pub build.

sdk/lib/_internal/pub/test/transformer/dart2js/minify_configuration_overrides_mode_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 'package:scheduled_test/scheduled_test.dart';
-
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 import '../../serve/utils.dart';
 
 main() {
   initConfig();
 
   integration("minify configuration overrides the mode", () {
     d.dir(appPath, [
       d.pubspec({
         "name": "myapp",
         "transformers": [{
           "\$dart2js": {"minify": true}
         }]
       }),
       d.dir("lib", [d.dir("src", [
         d.file("transformer.dart", REWRITE_TRANSFORMER)
       ])])
     ]).create();
 
     createLockFile('myapp', pkg: ['barback']);
 
     pubServe();
     requestShouldSucceed("main.dart.js", isMinifiedDart2JSOutput);
     endPubServe();
   });
 }