Removed the aec state as an input parameter to the FilterFar function.

BUG=webrtc:5201

Review URL: https://codereview.webrtc.org/1454983006

Cr-Original-Commit-Position: refs/heads/master@{#10787}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 54eb5e2e9ae91e9ad6dcb297de7b918ebe706d5f
5 files changed