[webrtc-stats] Packets or frames discarded on send?

henbos has just created a new issue for 
https://github.com/w3c/webrtc-stats:

== Packets or frames discarded on send? ==
Chromium's non-spec compliant getStats returns 
`googCandidatePair.packetsDiscardedOnSend` which are the "number of 
outgoing packets discarded due to socket errors" (a bit vague).

`RTCIceCandidatePairStats` has bytesSent and #172 discusses adding 
packetsSent (#173 similar discussion for `RTCTransportStats`). Should 
we also add `packetsDiscardedOnSend`?

If this makes sense as a per-frame counter instead, 
`RTCMediaStreamTrackStats` already has `framesDropped`on receive-side,
 it or similar could be used on the send-side.

Please view or discuss this issue at 
https://github.com/w3c/webrtc-stats/issues/178 using your GitHub 
account