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

sdk/lib/_internal/pub_generated/test/run/runs_named_app_in_dev_dependency_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 '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   initConfig();
   integration('runs a named Dart application in a dev dependency', () {
-    d.dir("foo", [
-      d.libPubspec("foo", "1.0.0"),
-      d.dir("bin", [
-        d.file("bar.dart", "main() => print('foobar');")
-      ])
-    ]).create();
+    d.dir(
+        "foo",
+        [
+            d.libPubspec("foo", "1.0.0"),
+            d.dir("bin", [d.file("bar.dart", "main() => print('foobar');")])]).create();
 
-    d.dir(appPath, [
-      d.pubspec({
+    d.dir(appPath, [d.pubspec({
         "name": "myapp",
         "dev_dependencies": {
-          "foo": {"path": "../foo"}
+          "foo": {
+            "path": "../foo"
+          }
         }
-      })
-    ]).create();
+      })]).create();
 
     pubGet();
 
     var pub = pubRun(args: ["foo:bar"]);
     pub.stdout.expect("foobar");
     pub.shouldExit();
   });
 }