Reason for revert: Unfortunately, this change breaks internal projects. Specifically the change to the CongestionController interface means anything implementing it will be forced to change in lock-step. Original issue's description: > Pass time constanct to bwe smoothing filter. > > BUG=webrtc:6443, webrtc:6303 > > Committed: https://crrev.com/9abbf5ae4ec7d688a9b4aa03a405f3faadb74b90 > Cr-Commit-Position: refs/heads/master@{#15266} TBR=minyue@webrtc.org,stefan@webrtc.org,solenberg@webrtc.org,michaelt@webrtc.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=webrtc:6443, webrtc:6303 Review-Url: https://codereview.webrtc.org/2532993002 Cr-Commit-Position: refs/heads/master@{#15272}