commit ea101331f4a7d3e8f4f5e10cca4266fe0cf252c1
author John Williams <jrw@google.com> Fri Jan 04 00:47:14 2019
committer Commit Bot <commit-bot@chromium.org> Fri Jan 04 00:47:14 2019
tree 6e7e3128676448c2364d8b79da15d7730f369daf
parent 20e755cb61ee8cf068fb314087fd8d85d8fc664a

[Cast MRP] Implement RECEIVER_STATUS support.

Forked from https://chromium-review.googlesource.com/c/chromium/src/+/1178225

This patch introduces CastSessionTracker, which is a singleton that
listens for RECEIVER_STATUS messages and keeps track of CastSession
object for each Cast MediaSink. It also exposes an Observer interface
for CastActivityManagers to listen for session changes in order to
update MediaRoutes.

Also, added logic to terminate existing session (if any) when trying to
launch a new session. Refactored launch parameters into a struct to
keep the number of input params down.

Bug: 809249
Change-Id: Ieb38e26d7b8191390f2fea5a8c41ea8955cbc352
Reviewed-on: https://chromium-review.googlesource.com/c/1297299
Commit-Queue: John Williams <jrw@chromium.org>
Reviewed-by: mark a. foltz <mfoltz@chromium.org>
Reviewed-by: Takumi Fujimoto <takumif@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619834}