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

sdk/lib/_internal/pub_generated/test/list_package_dirs/ignores_updated_pubspec_test.dart

 // Copyright (c) 2013, 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 d.file.
 
 import 'package:path/path.dart' as path;
 
 import '../../lib/src/io.dart';
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   initConfig();
   integration("uses what's in the lockfile regardless of the pubspec", () {
-    d.dir("foo", [
-      d.libDir("foo"),
-      d.libPubspec("foo", "1.0.0")
-    ]).create();
+    d.dir("foo", [d.libDir("foo"), d.libPubspec("foo", "1.0.0")]).create();
 
-    d.dir(appPath, [
-      d.appPubspec({
-        "foo": {"path": path.join(sandboxDir, "foo")}
-      })
-    ]).create();
+    d.dir(appPath, [d.appPubspec({
+        "foo": {
+          "path": path.join(sandboxDir, "foo")
+        }
+      })]).create();
 
     pubGet();
 
     // Add a dependency on "bar" and remove "foo", but don't run "pub get".
-    d.dir(appPath, [
-      d.appPubspec({
+    d.dir(appPath, [d.appPubspec({
         "bar": "any"
-      })
-    ]).create();
+      })]).create();
 
     // Note: Using canonicalize here because pub gets the path to the
     // entrypoint package from the working directory, which has had symlinks
     // resolve. On Mac, "/tmp" is actually a symlink to "/private/tmp", so we
     // need to accomodate that.
-    schedulePub(args: ["list-package-dirs", "--format=json"],
-        outputJson: {
-          "packages": {
-            "foo": path.join(sandboxDir, "foo", "lib"),
-            "myapp": canonicalize(path.join(sandboxDir, appPath, "lib"))
-          },
-          "input_files": [
-            canonicalize(path.join(sandboxDir, appPath, "pubspec.lock")),
-            canonicalize(path.join(sandboxDir, appPath, "pubspec.yaml"))
-          ]
-        });
+    schedulePub(args: ["list-package-dirs", "--format=json"], outputJson: {
+      "packages": {
+        "foo": path.join(sandboxDir, "foo", "lib"),
+        "myapp": canonicalize(path.join(sandboxDir, appPath, "lib"))
+      },
+      "input_files": [
+          canonicalize(path.join(sandboxDir, appPath, "pubspec.lock")),
+          canonicalize(path.join(sandboxDir, appPath, "pubspec.yaml"))]
+    });
   });
-}
+}