R=jgruber@chromium.org

Bug: v8:6666, v8:8015
Change-Id: I37c4fc6771247c448ec3194790fe9fad3c9bdebf
Reviewed-on: https://chromium-review.googlesource.com/1236054
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56096}