GitLab

This CL adds media controls detailed view. When media controls is
clicked outside of action buttons, we will navigate user to a
detailed view showing all playing media.

Bug: 1129784
Change-Id: I9b84089caacc36229664096af0fbf4f8a31b3f74
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2416682
Commit-Queue: Jazz Xu <jazzhsu@chromium.org>
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Reviewed-by: Jenny Zhang <jennyz@chromium.org>
Reviewed-by: Tim Song <tengs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809528}