The revert of the original CL was commit 36d4c545007129446e551c45c17b25377dce89a4. Original review: https://codereview.webrtc.org/1413483003/ The original CL changes a function on audio_processing.h that is used by Chrome, this CL adds back the old function. NOTRY=true TBR=glaznev@webrtc.org, henrik.lundin@webrtc.org, solenberg@google.com, henrikg@webrtc.org, perkj@webrtc.org BUG=webrtc:4741 Review URL: https://codereview.webrtc.org/1541633002 Cr-Commit-Position: refs/heads/master@{#11093}