Reason for revert: Breaks downstream code, so revert again. Yay. Original issue's description: > Move FilePlayer and FileRecorder to Voice Engine > > Because Voice Engine was the only user. > > (This is a re-land of https://codereview.webrtc.org/2037623002, which > had to be reverted.) > > NOPRESUBMIT=True > > Committed: https://crrev.com/dc65ea29b3270ad418050658ad962ddd33ee70c1 > Cr-Commit-Position: refs/heads/master@{#13757} TBR=perkj@webrtc.org,kjellander@webrtc.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true Review-Url: https://codereview.webrtc.org/2245153002 Cr-Commit-Position: refs/heads/master@{#13758}