[kernel] Support for top-level generic functions.

pkg/kernel/test/closures_type_vars/closures_type_vars.status

Index: pkg/kernel/test/closures_type_vars/closures_type_vars.status
diff --git a/pkg/kernel/test/closures_type_vars/closures_type_vars.status b/pkg/kernel/test/closures_type_vars/closures_type_vars.status
index 99e87d160df7bf17d080276bd6cca0449278160c..36429882720e4fd82644e47d24bf02e1f4587dbd 100644
--- a/pkg/kernel/test/closures_type_vars/closures_type_vars.status
+++ b/pkg/kernel/test/closures_type_vars/closures_type_vars.status
@@ -1,5 +1,3 @@
 # Copyright (c) 2017, 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.md file.
-
-type_variables: RuntimeError