Follow on to Bug 784517, which is for the signaling piece to support multiple A/V flows. This is the networking piece to support multiple A/V flows.

This work would start after Jan 10 (after Bug 786234 is finished) and last approximately 12 weeks. This will likely turn into a meta bug, but I'd like to target this work for mid April (circa Gecko 32) initially, and we'll do lots more refinement as we get closer to this date.

It'd be good to break this bug down into smaller bugs.

asking Byron for breakdown into smaller parts and estimation, because he is working in this area already.

My biggest question is going to be what is considered under the umbrella of signalling support, since the two need to integrate. Once we remove some hard-coding of stuff (all entirely outside of things like ICE, RTP, etc), my suspicion is that it will not be much work. The best way to get you an estimate, I think, is to just try making it configurable (with defaults of what is hard-coded now), and try exercising this configurability in a unit test. This could be done independently of work on the JSEP side of things, I think.