194f40a2e7
The MovingAverage class was very specific to the QualityScaler. This commit generalizes the MovingAverage class to be useful in other situations as well, and adapts the QualityScaler to use the new MovingAverage. BUG=webrtc:6304 Review-Url: https://codereview.webrtc.org/2310853002 Cr-Commit-Position: refs/heads/master@{#14207}