GitLab

This handles messages from the injec namespace in the Cast Streaming
Receiver by returning a "Not supported" message to the sender.

Bug: 1134435, b/165087393
Change-Id: I866c76a72ba42e127def953563762b095491cc28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2441940
Commit-Queue: Fabrice de Gans-Riberi <fdegans@chromium.org>
Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813319}