Since the class `TypeConstraintGatherer` (which is only used in
`_fe_analyzer_shared`'s unit tests) is now used both by
`type_constraint_gatherer_test.dart` and by `mini_ast.dart`, it makes
sense for it to live in its own file.
Change-Id: I7c8a58cfbf3724e2c8313b701345bc47ce032522
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/404060
Commit-Queue: Paul Berry <paulberry@google.com>
Reviewed-by: Chloe Stefantsova <cstefantsova@google.com>
Paul Berry
e1ba3ea504