[webrtc-stats] Definitions from MSE need re-targeting

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

== Definitions from MSE need re-targeting ==
The following stats:

- framesDecoded
- framesDropped
- framesCorrupted

are defined with reference to section 5 of [MEDIA-SOURCE], which is 
said to be https://www.w3.org/TR/media-source/

However, section 5 of that document doesn't have any such counters.

There was an earlier set of metrics in the 20160705 version, as part 
fo the VideoPlaybackQuality object, but this has disappeared in later 
versions:

https://www.w3.org/TR/2016/CR-media-source-20160705/#videoplaybackquality

These definitions need retargeting.


Please view or discuss this issue at 
https://github.com/w3c/webrtc-stats/issues/161 using your GitHub 
account