The previous version was correct too, since we check sminess before. But with the
new check, it's easier to see it's correct.

BUG=v8:7308

Change-Id: I1632353ee5dfd305479858ec4a690b17bb70e6a6
Reviewed-on: https://chromium-review.googlesource.com/1039525Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53099}