Reason for revert: Breaks chrome, in particular, the tests in media_stream_remote_video_source_unittest.cc use the InitToBlack method which is being deleted. Original issue's description: > New static method I420Buffer::SetToBlack. > > Replaces cricket::VideoFrame::SetToBlack and > cricket::WebRtcVideoFrame::InitToBlack, which are deleted. > > Refactors the black frame logic in VideoBroadcaster, and a few of the > tests. > > BUG=webrtc:5682 > > Committed: https://crrev.com/663f9e2ddc86e813f6db04ba2cf5ac1ed9e7ef67 > Cr-Commit-Position: refs/heads/master@{#13063} TBR=perkj@webrtc.org,pbos@webrtc.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=webrtc:5682 Review-Url: https://codereview.webrtc.org/2049023002 Cr-Commit-Position: refs/heads/master@{#13065}