R=jkummerow@chromium.org
TEST=mjsunit/object-is

Change-Id: Ic933c71d8d7baa252644a69cd7816a8fc0ac85ab
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1914206Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64937}