Store the async-await compiled pub code directly in the repo.

sdk/lib/_internal/pub_generated/test/serve/gets_first_if_dependency_is_not_installed_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 'package:path/path.dart' as path;
 import 'package:scheduled_test/scheduled_test.dart';
-
 import '../../lib/src/io.dart';
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import 'utils.dart';
-
 main() {
   initConfig();
   integration("gets first if a dependency is not installed", () {
     servePackages((builder) => builder.serve("foo", "1.2.3"));
-
-    d.appDir({"foo": "1.2.3"}).create();
-
-    // Run pub to get a lock file.
+    d.appDir({
+      "foo": "1.2.3"
+    }).create();
     pubGet();
-
-    // Delete the system cache so it isn't installed any more.
     schedule(() => deleteEntry(path.join(sandboxDir, cachePath)));
-
     pubServe(shouldGetFirst: true);
     requestShouldSucceed("packages/foo/foo.dart", 'main() => "foo 1.2.3";');
     endPubServe();
   });
 }