This reverts commit 1a03960e632a04e2ff866f2048cc36146af83e41.
Reason for revert: breaks downstream projects.
Original change's description:
> Remove APM internal usage of EchoCancellation
>
> This CL:
> - Changes EchoCancellationImpl to inherit privately from
> EchoCancellation.
> - Removes usage of AudioProcessing::echo_cancellation() inside most of
> the audio processing module and unit tests.
> - Default-enables metrics collection in AEC2.
>
> This CL breaks audioproc_f backwards compatibility: It can no longer
> use all recorded settings (drift compensation, suppression level), but
> prints an error message when such settings are encountered.
>
> Some code in audio_processing_unittest.cc still uses the old interface.
> I'll handle that in a separate change, as it is not as straightforward
> to preserve coverage.
>
> Bug: webrtc:9535
> Change-Id: Ia4d4b8d117ccbe516e5345c15d37298418590686
> Reviewed-on: https://webrtc-review.googlesource.com/97603
> Commit-Queue: Sam Zackrisson <saza@webrtc.org>
> Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#24724}
TBR=gustaf@webrtc.org,saza@webrtc.org
Change-Id: Ifdc4235f9c5ee8a8a5d32cc8e1dda0853b941693
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:9535
Reviewed-on: https://webrtc-review.googlesource.com/100305
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24729}
271812a893