Minor refactoring; shouldn't affect behavior.

This is a partial reland of https://crrev.com/c/3597106

Bug: v8:12808
Change-Id: Ibcc683317a6a85bb332dc96b212275f832cc59d8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3665263Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#81079}