It was using MakeRef but it's not guaranteed that we can create a Ref
for the prototype if we haven't seen it during serialization. Use
TryMakeRef instead.

Tbr: jgruber@chromium.org
Bug: chromium:1206670, v8:7790
Change-Id: Ifc00cb1dbf7747c766011f5915bb15fe093b920c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2878749Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74442}