Also tests/language_2 (which hopefully we can delete soon).
Change-Id: I4c7086ecb1b374c2068be9d1366f76323435e57f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/336624
Commit-Queue: Paul Berry <paulberry@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>