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

sdk/lib/_internal/pub_generated/test/run/runs_app_in_directory_in_entrypoint_test.dart

 // Copyright (c) 2014, 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.
 
 import 'package:path/path.dart' as path;
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   initConfig();
   integration('runs a Dart application in the entrypoint package', () {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir("tool", [
-        d.file("app.dart", "main() => print('tool');"),
-        d.dir("sub", [
-          d.file("app.dart", "main() => print('sub');")
-        ])
-      ])
-    ]).create();
+    d.dir(
+        appPath,
+        [
+            d.appPubspec(),
+            d.dir(
+                "tool",
+                [
+                    d.file("app.dart", "main() => print('tool');"),
+                    d.dir("sub", [d.file("app.dart", "main() => print('sub');")])])]).create();
 
     var pub = pubRun(args: [path.join("tool", "app")]);
     pub.stdout.expect("tool");
     pub.shouldExit();
 
     pub = pubRun(args: [path.join("tool", "sub", "app")]);
     pub.stdout.expect("sub");
     pub.shouldExit();
   });
 }