ffc5a96074
Reland https://github.com/dart-lang/sdk/commit/52d1b4e96d0a384b08aafc184785d1c74cb74efc with a fix to the test so that it does not use super mixins. Change-Id: Id1283b1066e853baca4c39402c255ceaa90662f4 Reviewed-on: https://dart-review.googlesource.com/43002 Reviewed-by: Jens Johansen <jensj@google.com> Commit-Queue: Kevin Millikin <kmillikin@google.com>