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

sdk/lib/_internal/pub_generated/test/dart2js/compiles_generated_file_from_dependency_outside_web_test.dart

 // Copyright (c) 2014, 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() {
   // This is a regression test for issue #17198.
   initConfig();
   withBarbackVersions("any", () {
-    integration("compiles a Dart file that imports a generated file to JS "
-        "outside web/", () {
-      d.dir(appPath, [
-        d.pubspec({
+    integration(
+        "compiles a Dart file that imports a generated file to JS " "outside web/",
+        () {
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
           "version": "0.0.1",
           "transformers": ["myapp/transformer"]
         }),
-        d.dir("lib", [
-          d.file("transformer.dart", dartTransformer("munge"))
-        ]),
-        d.dir("test", [
-          d.file("main.dart", """
+            d.dir("lib", [d.file("transformer.dart", dartTransformer("munge"))]),
+            d.dir("test", [d.file("main.dart", """
 import "other.dart";
 void main() => print(TOKEN);
-"""),
-          d.file("other.dart", """
+"""), d.file("other.dart", """
 library other;
 const TOKEN = "before";
-""")
-        ])
-      ]).create();
+""")])]).create();
 
       createLockFile('myapp', pkg: ['barback']);
 
       pubServe(args: ["test"]);
-      requestShouldSucceed("main.dart.js", contains("(before, munge)"),
+      requestShouldSucceed(
+          "main.dart.js",
+          contains("(before, munge)"),
           root: "test");
       endPubServe();
     });
   });
 }