Delete GetChromaWidth, GetChromaHeight, and GetChromaSize. Delete unused function VideoFrameEqual. BUG=webrtc:5682 Review URL: https://codereview.webrtc.org/1838353004 Cr-Commit-Position: refs/heads/master@{#12213}
BUG= R=tkchin@webrtc.org Review URL: https://codereview.webrtc.org/1533193003 . Patch from Jon Hjelle <hjon@andyet.net>. Cr-Commit-Position: refs/heads/master@{#11203}