Use native async/await support in pub.

sdk/lib/_internal/pub_generated/test/get/git/different_repo_name_test.dart

-// Copyright (c) 2012, 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.
-
-library pub_tests;
-
-import '../../descriptor.dart' as d;
-import '../../test_pub.dart';
-
-main() {
-  initConfig();
-  integration(
-      'doesn\'t require the repository name to match the name in the ' 'pubspec',
-      () {
-    ensureGit();
-
-    d.git(
-        'foo.git',
-        [d.libDir('weirdname'), d.libPubspec('weirdname', '1.0.0')]).create();
-
-    d.dir(appPath, [d.appPubspec({
-        "weirdname": {
-          "git": "../foo.git"
-        }
-      })]).create();
-
-    pubGet();
-
-    d.dir(
-        packagesPath,
-        [
-            d.dir(
-                'weirdname',
-                [d.file('weirdname.dart', 'main() => "weirdname";')])]).validate();
-  });
-}