Make chromeos/LACROS_OWNERS self owned with no parents.

Change-Id: Idc543c5c1e57d333e8d4780ac96ba4601c8d87c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3072586


Reviewed-by: James Cook <jamescook@chromium.org>
Commit-Queue: Erik Chen <erikchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#908676}