c2d1260c4a
This will allow the front end to efficiently decide where to insert "as" checks. Change-Id: I4776488684acdbf356ed3cb286e8d516d18719e1 Reviewed-on: https://dart-review.googlesource.com/14507 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Paul Berry <paulberry@google.com>