R=bmeurer@chromium.org, leszeks@chromium.org

Bug: v8:178
Change-Id: I00411ddfee458a71464dcba7f1b504b46c70ef06
Reviewed-on: https://chromium-review.googlesource.com/953002Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51811}