b1ca073db4
Use AdaptDown/AdaptUp instead of ScaleDown/ScaleUp, since we may want to adapt using other means than resolution. Also, extend vie_encoder with unit test that actually uses frames scaled to resolution as determined by VideoAdapter, since that seems to be the default implementation. BUG=webrtc:4172 Review-Url: https://codereview.webrtc.org/2652893015 Cr-Commit-Position: refs/heads/master@{#16402}