Along with double holey support.

Bug: v8:1956
Change-Id: Ic7fb233c57cbc3d43a5a6190f5d166686ae86df7
Reviewed-on: https://chromium-review.googlesource.com/874476Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50712}