R=petermarshall@chromium.org

Bug: v8:7433
Change-Id: Ibeef2c6855b8ffb6076be889a859da513877171f
Reviewed-on: https://chromium-review.googlesource.com/928563
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51429}