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

sdk/lib/_internal/pub_generated/test/serve/native_watch_replaced_file_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:async';
 import 'dart:io';
 
 import 'package:path/path.dart' as p;
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import 'utils.dart';
 
 main() {
   // This is a regression test for http://dartbug.com/21402.
   initConfig();
   withBarbackVersions("any", () {
-    integration("picks up files replaced after serving started when using the "
-        "native watcher", () {
-      d.dir(appPath, [
-        d.pubspec({
+    integration(
+        "picks up files replaced after serving started when using the "
+            "native watcher",
+        () {
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
           "transformers": ["myapp/src/transformer"]
         }),
-        d.dir("lib", [d.dir("src", [
-          d.file("transformer.dart", REWRITE_TRANSFORMER)
-        ])]),
-        d.dir("web", [
-          d.file("file.txt", "before"),
-        ]),
-        d.file("other", "after")
-      ]).create();
+            d.dir("lib", [d.dir("src", [d.file("transformer.dart", REWRITE_TRANSFORMER)])]),
+            d.dir("web", [d.file("file.txt", "before"),]),
+            d.file("other", "after")]).create();
 
       createLockFile("myapp", pkg: ["barback"]);
 
       pubServe(args: ["--no-force-poll"]);
       waitForBuildSuccess();
       requestShouldSucceed("file.out", "before.out");
 
       schedule(() {
         // Replace file.txt by renaming other on top of it.
-        return new File(p.join(sandboxDir, appPath, "other"))
-            .rename(p.join(sandboxDir, appPath, "web", "file.txt"));
+        return new File(
+            p.join(
+                sandboxDir,
+                appPath,
+                "other")).rename(p.join(sandboxDir, appPath, "web", "file.txt"));
       });
 
       // Read the transformed file to ensure the change is actually noticed by
       // pub and not that we just get the new file contents piped through
       // without pub realizing they've changed.
       waitForBuildSuccess();
       requestShouldSucceed("file.out", "after.out");
 
       endPubServe();
     });
   });
 }