GitLab

Chromium side of the implementation of tracking profile stats (number
of profiles, number of signed in profiles) through the Omaha channel
for Mac.

Was reverted: https://codereview.chromium.org/974423002

BUG=409895
TBR=grt@chromium.org

Review URL: https://codereview.chromium.org/1024533002

Cr-Commit-Position: refs/heads/master@{#321807}