tree cf3abad04e2b3a40ad9517e666cf7facfed81e2a
parent b3295a1327a2ffa07cbb706a657cdaeabdacbee7
author Konstantin Shcheglov <scheglov@google.com> 1548280503 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1548280503 +0000

Support for override completions in mixins.

Also moves tests for override implementations into a separate class.
New tests:
  test_mixin_method_of_interface
  test_mixin_method_of_superclassConstraint

Changes for deciding whether to generate `super` invocation.

R=brianwilkerson@google.com

Change-Id: I7f875695ce81f0212863fbd2f9fe1f1b9d7aaa3f
Reviewed-on: https://dart-review.googlesource.com/c/90784
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>