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

sdk/lib/_internal/pub_generated/test/dart2js/outputs_deferred_libraries_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:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 const MAIN = """
@@ skipping 22 matching lines @@
 fn() => print("b");
 """;
 
 main() {
   initConfig();
   integration("compiles deferred libraries to separate outputs", () {
     // Dart2js can take a long time to compile dart code, so we increase the
     // timeout to cope with that.
     currentSchedule.timeout *= 3;
 
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir('web', [
-        d.file('main.dart', MAIN),
-        d.file('a.dart', A),
-        d.file('b.dart', B)
-      ])
-    ]).create();
+    d.dir(
+        appPath,
+        [
+            d.appPubspec(),
+            d.dir(
+                'web',
+                [
+                    d.file('main.dart', MAIN),
+                    d.file('a.dart', A),
+                    d.file('b.dart', B)])]).create();
 
-    schedulePub(args: ["build"],
+    schedulePub(
+        args: ["build"],
         output: new RegExp(r'Built 3 files to "build".'));
 
-    d.dir(appPath, [
-      d.dir('build', [
-        d.dir('web', [
-          d.matcherFile('main.dart.js', isNot(isEmpty)),
-          d.matcherFile('main.dart.js_1.part.js', isNot(isEmpty)),
-          d.matcherFile('main.dart.js_2.part.js', isNot(isEmpty)),
-        ])
-      ])
-    ]).validate();
+    d.dir(
+        appPath,
+        [
+            d.dir(
+                'build',
+                [
+                    d.dir(
+                        'web',
+                        [
+                            d.matcherFile('main.dart.js', isNot(isEmpty)),
+                            d.matcherFile('main.dart.js_1.part.js', isNot(isEmpty)),
+                            d.matcherFile('main.dart.js_2.part.js', isNot(isEmpty)),])])]).validate();
   });
 }