It unnecessarily allowed for transitions in the presence of multiple
receiver maps.

Bug: v8:7790
Change-Id: I226f499f626ffb7c1b084aa5a45684e7782d1760
Reviewed-on: https://chromium-review.googlesource.com/c/1456088Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59459}