Add a flag to Kernel classes that indicates that they were Dart mixin
declarations. Also, add an API to Kernel Class that allows a list of
superclass constraints to be gotten from it.
Change-Id: Ie78e7e56b5421dfb9d340e4330135b8d6f4e94f1
Reviewed-on: https://dart-review.googlesource.com/75261
Commit-Queue: Kevin Millikin <kmillikin@google.com>
Reviewed-by: Peter von der Ahé <ahe@google.com>
Reviewed-by: Dmitry Stefantsov <dmitryas@google.com>
Kevin Millikin
2e43557274