Reason for revert: Breaks chrome FYI bots. Original issue's description: > Delete webrtc::VideoFrame methods buffer and stride. > > To make the HasOneRef/IsMutable hack work, also had to change the > video_frame_buffer method to return a const ref to a scoped_ref_ptr, > to not imply an AddRef. > > BUG=webrtc:5682 TBR=perkj@webrtc.org,magjed@webrtc.org,pbos@webrtc.org,pthatcher@webrtc.org,stefan@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/1935443002 Cr-Commit-Position: refs/heads/master@{#12558}