Rationale:
Improves the analysis if instance calls need checks
(check class or check null) combined with CHA.
Bug: https://github.com/dart-lang/sdk/issues/33664
Change-Id: I0a4761f8816bf5a5aaf5d17ca56d8bf4e3b79fc3
Reviewed-on: https://dart-review.googlesource.com/64440
Commit-Queue: Aart Bik <ajcbik@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>