... so that we can get rid of explicit AllowHandleDereference at the
call sites.

Bug: v8:6048
Change-Id: I1c31998fc8e0a63348f52ad60dd8c49244d45b40
Reviewed-on: https://chromium-review.googlesource.com/563658Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46500}