BUG=v8:6243
TBR=jgruber@chromium.org,leszeks@chromium.org

Change-Id: Ib830681073f4d3de4e500bf6144c0df2f9f4873f
Reviewed-on: https://chromium-review.googlesource.com/562775Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46469}