fix override checking of mixins

fix override checking of mixins

it was rejecting some patterns that are sound, because the mixin member is overridden and thus not exposed.

R=leafp@google.com

Committed: https://github.com/dart-lang/sdk/commit/ff8511c83efd77c498ca83d5ded70c0d16609729

[Jennifer Messerly, 2017-07-24 20:25:40]

jmesserly@google.com changed reviewers:
+ leafp@google.com, vsm@google.com

[Jennifer Messerly, 2017-07-24 20:25:40]

https://codereview.chromium.org/2988673003/diff/1/pkg/analyzer/lib/src/task/s...
File pkg/analyzer/lib/src/task/strong/checker.dart (right):

https://codereview.chromium.org/2988673003/diff/1/pkg/analyzer/lib/src/task/s...
pkg/analyzer/lib/src/task/strong/checker.dart:1668: /// Checks that most-derived
concrete members on this class correctly override
most of this is just attempting to improve the doc comments

[Leaf, 2017-07-24 20:32:53]

lgtm

[Jennifer Messerly, 2017-07-24 23:27:12]

Description was changed from

==========
fix override checking of mixins

it was rejecting some patterns that are sound, because the mixin member is
overridden and thus not exposed.
==========

to

==========
fix override checking of mixins

it was rejecting some patterns that are sound, because the mixin member is
overridden and thus not exposed.

R=leafp@google.com

Committed:
https://github.com/dart-lang/sdk/commit/ff8511c83efd77c498ca83d5ded70c0d16609729
==========

[Jennifer Messerly, 2017-07-24 23:27:13]

Committed patchset #2 (id:20001) manually as
ff8511c83efd77c498ca83d5ded70c0d16609729 (presubmit successful).