R=bmeurer@chromium.org

Bug: v8:7421
Change-Id: Iacdd8d294c02b7feb72e3a0bb397930e91197ae7
Reviewed-on: https://chromium-review.googlesource.com/926124
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51391}