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

sdk/lib/_internal/pub_generated/test/transformer/configuration/passes_configuration_to_a_transformer_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 'dart:convert';
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
@@ skipping 19 matching lines @@
         new Asset.fromString(id, JSON.encode(settings.configuration)));
     });
   }
 }
 """;
 
 main() {
   initConfig();
   withBarbackVersions("any", () {
     integration("passes configuration to a transformer", () {
-      var configuration = {"param": ["list", "of", "values"]};
+      var configuration = {
+        "param": ["list", "of", "values"]
+      };
 
-      d.dir(appPath, [
-        d.pubspec({
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
-          "transformers": [{"myapp/src/transformer": configuration}]
+          "transformers": [{
+              "myapp/src/transformer": configuration
+            }]
         }),
-        d.dir("lib", [d.dir("src", [
-          d.file("transformer.dart", transformer)
-        ])]),
-        d.dir("web", [
-          d.file("foo.txt", "foo")
-        ])
-      ]).create();
+            d.dir("lib", [d.dir("src", [d.file("transformer.dart", transformer)])]),
+            d.dir("web", [d.file("foo.txt", "foo")])]).create();
 
       createLockFile('myapp', pkg: ['barback']);
 
       var server = pubServe();
       requestShouldSucceed("foo.json", JSON.encode(configuration));
       endPubServe();
     });
   });
 }