cc23b7c1ea
Declared in webrtc::VideoRender, implemented in IncomingVideoStream. This cl also eliminates some of the few uses of webrtc::VideoFrame::CopyFrame. BUG=webrtc:5682 Review URL: https://codereview.webrtc.org/1885323002 Cr-Commit-Position: refs/heads/master@{#12427}