This CL adds windowing of the error signal in echo canceller 3 to avoid issues with spectral leakage affecting the quality of the filter estimate. Bug: webrtc:8661 Change-Id: I3e583f80fe02d7bba387a906bf44fbe7b89a2a6f Reviewed-on: https://webrtc-review.googlesource.com/34188 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21328}