commit 7d627b6289d62504a5f62280c7eeab35f1a08914
author John Williams <jrw@google.com> Mon Jan 14 21:05:34 2019
committer Commit Bot <commit-bot@chromium.org> Mon Jan 14 21:05:34 2019
tree 6b0c5dce3ea500f9f440b0b9a7e2e5f89cc71dba
parent 0692410369582ff412054fb672f3912553eefb1c

[Cast MRP] Media commands, media status, and SET_VOLUME.

Re-roll of https://chromium-review.googlesource.com/c/chromium/src/+/1372666

This patch implements media commands sent from the SDK to the receiver,
as well as media status messages from the receiver to the SDK.

This patch also implements the SET_VOLUME message which sets the system
level volume and not considered part of media commands.

Bug: 809249
Change-Id: If6569aa926c9a458f516f8ca9593a331c1916662
Reviewed-on: https://chromium-review.googlesource.com/c/1372666
Commit-Queue: John Williams <jrw@chromium.org>
Reviewed-by: mark a. foltz <mfoltz@chromium.org>
Reviewed-by: Takumi Fujimoto <takumif@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#622254}
Reviewed-on: https://chromium-review.googlesource.com/c/1407303
Cr-Commit-Position: refs/heads/master@{#622597}