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

sdk/lib/_internal/pub_generated/test/upgrade/report/shows_number_of_changed_dependencies_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.
 
 library pub_tests;
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   initConfig();
-  integration("does not show how many newer versions are available for "
-      "packages that are locked and not being upgraded", () {
+  integration(
+      "does not show how many newer versions are available for "
+          "packages that are locked and not being upgraded",
+      () {
     servePackages((builder) {
       builder.serve("a", "1.0.0");
       builder.serve("b", "1.0.0");
       builder.serve("c", "2.0.0");
     });
 
     d.appDir({
       "a": "any"
     }).create();
 
     // One dependency changed.
     pubUpgrade(output: new RegExp(r"Changed 1 dependency!$"));
 
     // Remove one and add two.
     d.appDir({
       "b": "any",
       "c": "any"
     }).create();
 
     pubUpgrade(output: new RegExp(r"Changed 3 dependencies!$"));
 
     // Don't change anything.
     pubUpgrade(output: new RegExp(r"No dependencies changed.$"));
   });
 }