Extend raw_ref check to chromeos platform.

This change enables the check on chromeos lacros and ash.
Clang will now show warnings where raw_ref<T> could be used.

Bug: 40268473
Change-Id: I0866d7572dfe6cda3b41b2c27aafffac42b638a7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5392563


Reviewed-by: Arthur Eubanks <aeubanks@google.com>
Commit-Queue: Ali Hijazi <ahijazi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1278853}