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

sdk/lib/_internal/pub_generated/test/lish/utils.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.
 
 library lish.utils;
 
 import 'dart:convert';
 
 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';
 
 void handleUploadForm(ScheduledServer server, [Map body]) {
   server.handle('GET', '/api/packages/versions/new', (request) {
     return server.url.then((url) {
-      expect(request.headers,
+      expect(
+          request.headers,
           containsPair('authorization', 'Bearer access token'));
 
       if (body == null) {
         body = {
           'url': url.resolve('/upload').toString(),
           'fields': {
             'field1': 'value1',
             'field2': 'value2'
           }
         };
       }
 
-      return new shelf.Response.ok(JSON.encode(body),
-          headers: {'content-type': 'application/json'});
+      return new shelf.Response.ok(JSON.encode(body), headers: {
+        'content-type': 'application/json'
+      });
     });
   });
 }
 
 void handleUpload(ScheduledServer server) {
   server.handle('POST', '/upload', (request) {
     // TODO(nweiz): Once a multipart/form-data parser in Dart exists, validate
     // that the request body is correctly formatted. See issue 6952.
-    return drainStream(request.read())
-        .then((_) => server.url)
-        .then((url) => new shelf.Response.found(url.resolve('/create')));
+    return drainStream(
+        request.read()).then(
+            (_) =>
+                server.url).then((url) => new shelf.Response.found(url.resolve('/create')));
   });
 }