Support directories other than "web" in pub build.

sdk/lib/_internal/pub/test/lish/force_does_not_publish_if_there_are_errors_test.dart

 // Copyright (c) 2013, 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 'package:scheduled_test/scheduled_test.dart';
 import 'package:scheduled_test/scheduled_server.dart';
 
+import '../../lib/src/exit_codes.dart' as exit_codes;
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   initConfig();
   setUp(d.validPackage.create);
 
   integration('--force does not publish if there are errors', () {
     var pkg = packageMap("test_pkg", "1.0.0");
     pkg.remove("homepage");
     d.dir(appPath, [d.pubspec(pkg)]).create();
 
     var server = new ScheduledServer();
     var pub = startPublish(server, args: ['--force']);
 
-    pub.shouldExit(0);
+    pub.shouldExit(exit_codes.SUCCESS);
     expect(pub.remainingStderr(), completion(contains(
         "Sorry, your package is missing a requirement and can't be "
         "published yet.")));
   });
 }