R=adamk@chromium.org, mstarzinger@chromium.org

Bug: v8:5244, chromium:765479
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I684805acc194a93b96d74e3e64834867dce78dee
Reviewed-on: https://chromium-review.googlesource.com/668677Reviewed-by: Daniel Ehrenberg <littledan@chromium.org>
Commit-Queue: Josh Wolfe <jwolfe@igalia.com>
Cr-Commit-Position: refs/heads/master@{#48069}