Stop initialization if WebRTC is disabled

[samuelweiler]

Breaking this item out from #170. (@NalaGinrut, for tracking)

3. The WebRTC issue
   The MediaDecodingType has WebRTC option that is used to represent a configuration that is meant to be received using RTCPeerConnection. However, WebRTC has known privacy issues: https://wiki.mozilla.org/Media/WebRTC/Privacy

Question: Is it possible to stop the initialization process if the WebRTC was disabled?

[chcunningham]

Is it possible to stop the initialization process if the WebRTC was disabled?

Sorry, which initialization process do you mean?

[NalaGinrut]

@chcunningham My understand is that MediaConfiguration is used to initialize the MediaCapabiliies (I may wrong, please correct me). If the encode/decode type in MediaConfiguration is webrtc, could it be invalidated if the browser has disabled webrtc?

[chcunningham]

My understand is that MediaConfiguration is used to initialize the MediaCapabiliies (I may wrong, please correct me)

I would substitute the word "query" for "initialize". The MC API should not change any state held by the UA. If webrtc is disabled, all queries for webrtc capabilities should come back with supported=false.

[NalaGinrut]

@chcunningham Thanks for explaining it! I think this one is clear and done.
cc @samuelweiler

[chcunningham]

Thanks!