.. by using isolate-full accessors.

Bug: v8:9353
Change-Id: I3b31c21df687e06f322d03daec4b9b532ac022d9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1683996Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62487}