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

sdk/lib/_internal/pub_generated/test/global/activate/unexpected_arguments_test.dart

Index: sdk/lib/_internal/pub_generated/test/global/activate/unexpected_arguments_test.dart
diff --git a/sdk/lib/_internal/pub/test/global/activate/unexpected_arguments_test.dart b/sdk/lib/_internal/pub_generated/test/global/activate/unexpected_arguments_test.dart
similarity index 66%
copy from sdk/lib/_internal/pub/test/global/activate/unexpected_arguments_test.dart
copy to sdk/lib/_internal/pub_generated/test/global/activate/unexpected_arguments_test.dart
index 5d519177335f3298556b39ed51914ab36c347945..090a437ef231f20a22df695215df236ae648b7c9 100644
--- a/sdk/lib/_internal/pub/test/global/activate/unexpected_arguments_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/global/activate/unexpected_arguments_test.dart
@@ -1,14 +1,10 @@
-// Copyright (c) 2014, 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.
-
 import '../../../lib/src/exit_codes.dart' as exit_codes;
 import '../../test_pub.dart';
-
 main() {
   initConfig();
   integration('fails if there are extra arguments', () {
-    schedulePub(args: ["global", "activate", "foo", "1.0.0", "bar", "baz"],
+    schedulePub(
+        args: ["global", "activate", "foo", "1.0.0", "bar", "baz"],
         error: """
             Unexpected arguments "bar" and "baz".