Revert "Use native async/await support in pub."

sdk/lib/_internal/pub_generated/test/lish/cloud_storage_upload_provides_an_error_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 'package:shelf/shelf.dart' as shelf;
 
 import '../../lib/src/io.dart';
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import 'utils.dart';
 
 main() {
   initConfig();
   setUp(d.validPackage.create);
 
   integration('cloud storage upload provides an error', () {
     var server = new ScheduledServer();
     d.credentialsFile(server, 'access token').create();
     var pub = startPublish(server);
 
     confirmPublish(pub);
     handleUploadForm(server);
 
     server.handle('POST', '/upload', (request) {
       return drainStream(request.read()).then((_) {
         return new shelf.Response.notFound(
             '<Error><Message>Your request sucked.</Message></Error>',
-            headers: {'content-type': 'application/xml'});
+            headers: {
+          'content-type': 'application/xml'
+        });
       });
     });
 
     // TODO(nweiz): This should use the server's error message once the client
     // can parse the XML.
     pub.stderr.expect('Failed to upload the package.');
     pub.shouldExit(1);
   });
 }