A random grab-bag of trivial fixes I came across while working on
another CL.

Bug: v8:8888
Change-Id: I6e46e1fe5a547854d8afbac19f7e049f1661c406
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2388113
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69675}