GitLab

This adds a standalone cast streaming receiver implementation intended
to be used for tests involving cast streaming.

Bug: 1110490
Change-Id: Ide0e33587d2e269e8808102342cc30aa7513cb7c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2583103
Commit-Queue: Fabrice de Gans-Riberi <fdegans@chromium.org>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836783}