This allows for the possiblity to move the QualityScaler out of the VideoStreamEncoder in the future. Bug: webrtc:11222 Change-Id: I1d563cf08791e27ff5065ce90bcb150a7974d868 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/167534 Reviewed-by: Henrik Boström <hbos@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Evan Shrubsole <eshr@google.com> Cr-Commit-Position: refs/heads/master@{#30406}