GitLab

This CL makes sure we never show play/pause and scrim controls when
there is no video in Picture-in-Picture window.

Bug: 879529
Change-Id: I8d9ee5dcde24e9dc1b3e89af091c3385d338b046
Reviewed-on: https://chromium-review.googlesource.com/1235580
Commit-Queue: François Beaufort <beaufort.francois@gmail.com>
Reviewed-by: apacible <apacible@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593513}