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

sdk/lib/_internal/pub_generated/test/serve/gets_first_if_git_url_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 url doesn't match the one in "
-      "the lock file", () {
-    d.git("foo-before.git", [
-      d.libPubspec("foo", "1.0.0"),
-      d.libDir("foo", "before")
-    ]).create();
+  integration(
+      "gets first if a git dependency's url doesn't match the one in "
+          "the lock file",
+      () {
+    d.git(
+        "foo-before.git",
+        [d.libPubspec("foo", "1.0.0"), d.libDir("foo", "before")]).create();
 
-    d.git("foo-after.git", [
-      d.libPubspec("foo", "1.0.0"),
-      d.libDir("foo", "after")
-    ]).create();
+    d.git(
+        "foo-after.git",
+        [d.libPubspec("foo", "1.0.0"), d.libDir("foo", "after")]).create();
 
     d.appDir({
-      "foo": {"git": "../foo-before.git"}
+      "foo": {
+        "git": "../foo-before.git"
+      }
     }).create();
 
     pubGet();
 
     // Change the path in the pubspec.
     d.appDir({
-      "foo": {"git": "../foo-after.git"}
+      "foo": {
+        "git": "../foo-after.git"
+      }
     }).create();
 
     pubServe(shouldGetFirst: true);
     requestShouldSucceed("packages/foo/foo.dart", 'main() => "after";');
     endPubServe();
   });
 }