R=mstarzinger@chromium.org

Bug: v8:7721
Change-Id: I8fd2c532c36bfd5faec2947d3154a2984c13ed46
Reviewed-on: https://chromium-review.googlesource.com/1047668Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53042}