This is a preliminary step before removing BuiltinDescriptor.

Bug: v8:7754
Change-Id: I752134aa29431e5773c9813361a3c6bda6f8872d
Reviewed-on: https://chromium-review.googlesource.com/1104169Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53794}