This way it can already be used during deserialization.

Bug: v8:7133
Change-Id: I6d6ddb6c6e5326384d014d653b163f3d917089e9
Reviewed-on: https://chromium-review.googlesource.com/793393Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49679}