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

sdk/lib/_internal/pub_generated/test/serve/web_socket/path_to_urls_with_line_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.
 
 library pub_tests;
 
 import 'package:path/path.dart' as p;
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 import '../utils.dart';
 
 main() {
   initConfig();
   integration("pathToUrls provides output line if given source", () {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir("web", [
-        d.file("main.dart", "main"),
-      ])
-    ]).create();
+    d.dir(
+        appPath,
+        [d.appPubspec(), d.dir("web", [d.file("main.dart", "main"),])]).create();
 
     pubServe();
 
     expectWebSocketResult("pathToUrls", {
       "path": p.join("web", "main.dart"),
       "line": 12345
     }, {
       "urls": [getServerUrl("web", "main.dart")],
       "line": 12345
     });
 
     endPubServe();
   });
 }