f54bb55244
Filter Class::direct_subclasses/implementors_ to remove tree-shaken classes. TEST=ci, manual UI interaction Bug: https://github.com/dart-lang/sdk/issues/45564 Change-Id: Ia2a46e9701745ce88dffa95a86b7756f3ab0921d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/194110 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Ben Konyi <bkonyi@google.com>