Register APM even though echo cancellation is disabled.

content/renderer/media/media_stream_audio_processor.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/media_stream_audio_processor.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
@@ skipping 649 matching lines @@
           clipping_level_min.value_or(webrtc::kClippedLevelMin)));
     }
   }
 
   // Create and configure the webrtc::AudioProcessing.
   audio_processing_.reset(webrtc::AudioProcessing::Create(config));
 
   // Enable the audio processing components.
   webrtc::AudioProcessing::Config apm_config;
 
+  if (playout_data_source_) {
+    playout_data_source_->AddPlayoutSink(this);
+  }
+
   if (echo_cancellation) {
     EnableEchoCancellation(audio_processing_.get());
 
-    if (playout_data_source_)
-      playout_data_source_->AddPlayoutSink(this);
-
     // Prepare for logging echo information. If there are data remaining in
     // |echo_information_| we simply discard it.
     echo_information_.reset(new EchoInformation());
   }
 
   if (goog_ns) {
     // The beamforming postfilter is effective at suppressing stationary noise,
     // so reduce the single-channel NS aggressiveness when enabled.
     const NoiseSuppression::Level ns_level =
         config.Get<webrtc::Beamforming>().enabled ? NoiseSuppression::kLow
@@ skipping 177 matching lines @@
       0 : agc->stream_analog_level();
 }
 
 void MediaStreamAudioProcessor::UpdateAecStats() {
   DCHECK(main_thread_runner_->BelongsToCurrentThread());
   if (echo_information_)
     echo_information_->UpdateAecStats(audio_processing_->echo_cancellation());
 }
 
 }  // namespace content