Integrate AvgCounter to be used for BWE stats in call.
Fixes for stats regression in:
WebRTC.Call.EstimatedSendBitrateInKbps
WebRTC.Call.PacerBitrateInKbps
Example:
BWE for a 15 seconds long call (with intervals of 1 sec):
|300|400|500|600|600|600|600| 0 | 0 | 0 | 0 | 0 |800|800|800| // 0 - network state down
Reported via OnNetworkChanged:
|300|400|500|600| x | x | x | 0 | x | x | x | x |800| x | x | // x - empty interval, 0 -> pauses stats
Stats:
|300|400|500|600|600|600|600| - | - | - | - | - |800|800|800| // x -> last value used (intervals during pause ignored)
AvgCounter uses the average of samples within an interval (interval length is 2 sec).
BUG=webrtc:6244
Review-Url: https://codereview.webrtc.org/2307913002
Cr-Commit-Position: refs/heads/master@{#14147}
ce2e13602e