Fine. More tests for BaseNameMembers, mostly inherited constructors.

Change-Id: I7febeb678bc1cf077cd5b3ed657332509c1e8baa
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/424704
Reviewed-by: Paul Berry <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: scheglov