Drive-by: Simplify pause logic.

Bug: v8:12615
Change-Id: I64e44bff1de1419f1290c9f79cf5bdfe65d8903f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3466796Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79120}