It didn't work properly anyhow (see issue #34657). Changed the call
sites to use GenericTypeAliasElementImpl.instantiate, which does have
the correct behavior.
Change-Id: I4b9c6cc8ddfcf3b0bebe40b7d874c4630c4b5ae4
Reviewed-on: https://dart-review.googlesource.com/c/79283
Commit-Queue: Paul Berry <paulberry@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
Auto-Submit: Paul Berry <paulberry@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
cc884b3449