GitLab

This CL adds picture-in-picture button to zenith dialog.
Will follow up with integration tests and unit tests.

Bug: 1047314
Change-Id: Id435d557b2eb80ac8d262da7f137a72b1cc1908c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2030353Reviewed-by: Tommy Steimel <steimel@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Commit-Queue: Jazz Xu <jazzhsu@chromium.org>
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737098}