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

sdk/lib/_internal/pub_generated/test/dart2js/does_not_compile_until_its_output_is_requested_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_stream.dart';
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
 
 main() {
   initConfig();
   integration("does not compile until its output is requested", () {
-    d.dir(appPath, [
-      d.pubspec({
+    d.dir(appPath, [d.pubspec({
         "name": "myapp",
         "version": "0.0.1",
       }),
-      d.dir("web", [
-        d.file("syntax-error.dart", "syntax error")
-      ])
-    ]).create();
+          d.dir("web", [d.file("syntax-error.dart", "syntax error")])]).create();
 
     var server = pubServe();
     server.stdout.expect("Build completed successfully");
 
     // Once we request the output, it should start compiling and fail.
     requestShould404("syntax-error.dart.js");
-    server.stdout.expect(emitsLines(
-        "[Info from Dart2JS]:\n"
-        "Compiling myapp|web/syntax-error.dart..."));
+    server.stdout.expect(
+        emitsLines(
+            "[Info from Dart2JS]:\n" "Compiling myapp|web/syntax-error.dart..."));
     server.stdout.expect(consumeThrough("Build completed with 1 errors."));
     endPubServe();
   });
 }