Some ChromeDriver integration tests create temporary ChromeDriver
instances. With this commit we make sure that these instances are
terminated as quickly as possible when they are no longer needed.

Bug: 375974725
Change-Id: I0306caaf60b2b0ea7e62d8d9339f8d65ce2fcf10
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5997970


Auto-Submit: Vladimir Nechaev <nechaev@chromium.org>
Commit-Queue: Maksim Sadym <sadym@chromium.org>
Reviewed-by: Maksim Sadym <sadym@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1378884}