V8 side for:
https://chromium-review.googlesource.com/c/chromium/tools/build/+/720373

TBR=sergiyb@chromium.org
NOTRY=true
NOTREECHECKS=true

Bug: chromium:726584
Change-Id: I240be307c1072a2fce354b4eda8a60e1c65b1607
Reviewed-on: https://chromium-review.googlesource.com/720796
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48575}