Re: [webrtc-pc] Required fields in RTCRtpParameters returned from getParameters

On re-reading the spec, the intent behind `transactionId` and [[LastReturnedParameters]], appears to be to require JS to only call `setParameters()` with modified results from the most recent `getParameters()`. With that in mind, I agree with @soareschen using `required` is clearer.

I have a PR with this and the split I suggested [above](https://github.com/w3c/webrtc-pc/issues/1493#issuecomment-324949511), so I'm re-opening to add it here.

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Received on Friday, 16 March 2018 18:42:11 UTC