Added basic framework for AEC3 in the audio processing module

webrtc/modules/audio_processing/echo_cancellation_impl.cc

Index: webrtc/modules/audio_processing/echo_cancellation_impl.cc
diff --git a/webrtc/modules/audio_processing/echo_cancellation_impl.cc b/webrtc/modules/audio_processing/echo_cancellation_impl.cc
index f6a0bcde7acc801c7014e5f73bce9be8e8f61d5b..9918bb473859349362db621ac8cc0ce603723bca 100644
--- a/webrtc/modules/audio_processing/echo_cancellation_impl.cc
+++ b/webrtc/modules/audio_processing/echo_cancellation_impl.cc
@@ -106,8 +106,7 @@ EchoCancellationImpl::EchoCancellationImpl(rtc::CriticalSection* crit_render,
       stream_has_echo_(false),
       delay_logging_enabled_(false),
       extended_filter_enabled_(false),
-      delay_agnostic_enabled_(false),
-      aec3_enabled_(false) {
+      delay_agnostic_enabled_(false) {
   RTC_DCHECK(crit_render);
   RTC_DCHECK(crit_capture);
 }
@@ -341,18 +340,9 @@ bool EchoCancellationImpl::is_delay_agnostic_enabled() const {
   return delay_agnostic_enabled_;
 }
 
-bool EchoCancellationImpl::is_aec3_enabled() const {
-  rtc::CritScope cs(crit_capture_);
-  return aec3_enabled_;
-}
-
 std::string EchoCancellationImpl::GetExperimentsDescription() {
   rtc::CritScope cs(crit_capture_);
-  std::string description = (aec3_enabled_ ? "AEC3;" : "");
-  if (refined_adaptive_filter_enabled_) {
-    description += "RefinedAdaptiveFilter;";
-  }
-  return description;
+  return refined_adaptive_filter_enabled_ ? "RefinedAdaptiveFilter;" : "";
 }
 
 bool EchoCancellationImpl::is_refined_adaptive_filter_enabled() const {
@@ -473,7 +463,6 @@ void EchoCancellationImpl::SetExtraOptions(const webrtc::Config& config) {
     delay_agnostic_enabled_ = config.Get<DelayAgnostic>().enabled;
     refined_adaptive_filter_enabled_ =
         config.Get<RefinedAdaptiveFilter>().enabled;
-    aec3_enabled_ = config.Get<EchoCanceller3>().enabled;
   }
   Configure();
 }
@@ -493,8 +482,6 @@ int EchoCancellationImpl::Configure() {
                                      extended_filter_enabled_ ? 1 : 0);
     WebRtcAec_enable_delay_agnostic(WebRtcAec_aec_core(canceller->state()),
                                     delay_agnostic_enabled_ ? 1 : 0);
-    WebRtcAec_enable_aec3(WebRtcAec_aec_core(canceller->state()),
-                          aec3_enabled_ ? 1 : 0);
     WebRtcAec_enable_refined_adaptive_filter(
         WebRtcAec_aec_core(canceller->state()),
         refined_adaptive_filter_enabled_);