This script will query extensions in the domain and
generate a list of machines that have them installed.

Change-Id: Ie70b982ca855b6364b4100f0b42adeee73f0b60a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2044331
Commit-Queue: Tien Mai <tienmai@chromium.org>
Reviewed-by: Julian Pastarmov <pastarmovj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742164}