GitLab

Show a Cast icon at the top left corner of Cast notifications in Global
Media Controls to make it easier to distinguish Cast notifications from
local notifications, which have no icon.

Screenshot:
https://drive.google.com/file/d/1701V_-4ufHnYMF-e_pdD20AyC8V4HdC0/view?usp=sharing

Bug: 1042008
Change-Id: I244564bef86d4209656cd60b377684dc205f8d45
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2026413Reviewed-by: Evan Stade <estade@chromium.org>
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Commit-Queue: Takumi Fujimoto <takumif@chromium.org>
Cr-Commit-Position: refs/heads/master@{#740368}