R=titzer@chromium.org
BUG=v8:7424

Change-Id: Ic0b8088402a4f64d1a285298a16285bdca4a7167
Reviewed-on: https://chromium-review.googlesource.com/1180897Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55210}