I wonder if we shouldn't pass the media object as a second arg, as the first one is usually used [to fill the model's data](http://backbonejs.org/#Model-constructor)

Would give something like `new app.models.Chat({}, webrtc)`, or possibly `new app.models.Chat({}, {media: webrtc})`

We could also set the media object as a model attribute, but as it's probably not serializable it looks quite dangerous.

Mixed feelings about this, up to you.