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

sdk/lib/_internal/pub_generated/test/dart2js/compiles_generated_file_from_dependency_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.
 
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
 
 main() {
   initConfig();
   withBarbackVersions("any", () {
-    integration("compiles a Dart file that imports a generated file in another "
-                "package to JS", () {
-      d.dir("foo", [
-        d.pubspec({
+    integration(
+        "compiles a Dart file that imports a generated file in another "
+            "package to JS",
+        () {
+      d.dir("foo", [d.pubspec({
           "name": "foo",
           "version": "0.0.1",
           "transformers": ["foo/transformer"]
-        }),
-        d.dir("lib", [
-          d.file("foo.dart", """
+        }), d.dir("lib", [d.file("foo.dart", """
 library foo;
 const TOKEN = "before";
 foo() => TOKEN;
-"""),
-          d.file("transformer.dart", dartTransformer("munge"))
-        ])
-      ]).create();
+"""), d.file("transformer.dart", dartTransformer("munge"))])]).create();
 
-      d.dir(appPath, [
-        d.appPubspec({
+      d.dir(appPath, [d.appPubspec({
           "foo": {
             "path": "../foo"
           }
-        }),
-        d.dir("web", [
-          d.file("main.dart", """
+        }), d.dir("web", [d.file("main.dart", """
 import "package:foo/foo.dart";
 main() => print(foo());
-""")
-        ])
-      ]).create();
+""")])]).create();
 
       createLockFile("myapp", sandbox: ["foo"], pkg: ["barback"]);
 
       pubServe();
       requestShouldSucceed("main.dart.js", contains("(before, munge)"));
       endPubServe();
     });
   });
 }