GitLab

We should not record audible tab metrics if the tab
is muted.

BUG=907671

Change-Id: Ie852abb55bf4c0bb7f202bdd774b12ba5291f945
Reviewed-on: https://chromium-review.googlesource.com/c/1346993Reviewed-by: Chrome Cunningham <chcunningham@chromium.org>
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611439}