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

sdk/lib/_internal/pub_generated/test/serve/gets_first_if_git_ref_changed_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 file.
 
 library pub_tests;
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import 'utils.dart';
 
 main() {
   initConfig();
-  integration("gets first if a git dependency's ref doesn't match the one in "
-      "the lock file", () {
-    var repo = d.git('foo.git', [
-      d.libDir('foo', 'before'),
-      d.libPubspec('foo', '1.0.0')
-    ]);
+  integration(
+      "gets first if a git dependency's ref doesn't match the one in "
+          "the lock file",
+      () {
+    var repo =
+        d.git('foo.git', [d.libDir('foo', 'before'), d.libPubspec('foo', '1.0.0')]);
     repo.create();
     var commit1 = repo.revParse('HEAD');
 
-    d.git('foo.git', [
-      d.libDir('foo', 'after'),
-      d.libPubspec('foo', '1.0.0')
-    ]).commit();
+    d.git(
+        'foo.git',
+        [d.libDir('foo', 'after'), d.libPubspec('foo', '1.0.0')]).commit();
 
     var commit2 = repo.revParse('HEAD');
 
     // Lock it to the ref of the first commit.
     d.appDir({
-      "foo": {"git": {"url": "../foo.git", "ref": commit1}}
+      "foo": {
+        "git": {
+          "url": "../foo.git",
+          "ref": commit1
+        }
+      }
     }).create();
 
     pubGet();
 
     // Change the commit in the pubspec.
     d.appDir({
-      "foo": {"git": {"url": "../foo.git", "ref": commit2}}
+      "foo": {
+        "git": {
+          "url": "../foo.git",
+          "ref": commit2
+        }
+      }
     }).create();
 
     pubServe(shouldGetFirst: true);
     requestShouldSucceed("packages/foo/foo.dart", 'main() => "after";');
     endPubServe();
   });
 }