Adjust typedef_test, cf. SDK issue #47561
Adjust typedef_test, cf. SDK issue #47561

Change-Id: I9e7455838cf9e13a223221255196515690280e56
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/219042
Reviewed-by: Konstantin Shcheglov <09e4d7516628963212bf4aace2f97603d2b706e4@google.com>
Commit-Queue: Erik Ernst <251bb01623bfda2cd9151e339a6e783ca432874c@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk