Missed the feedback in https://chromium-review.googlesource.com/1611803
to address the code comments.

Tbr: neis@chromium.org
Bug: chromium:961199, v8:8820
Change-Id: I1ff85c0a7554099b72461eb91de9ea4bb2a5bded
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1617242Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61597}