R=titzer@chromium.org
BUG=v8:7549

Change-Id: Ibae3ea41306ae89ee5caaa6ab2fdec6f08f2040c
Reviewed-on: https://chromium-review.googlesource.com/962361Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51927}