Added support in the AEC for refined filter adaptation.

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 12ea75efe1b65ff9f3da7bda63d027426c449830..c18ed94bd2c1b97bb4157e610c647149bab41560 100644
--- a/webrtc/modules/audio_processing/echo_cancellation_impl.cc
+++ b/webrtc/modules/audio_processing/echo_cancellation_impl.cc
@@ -415,7 +415,16 @@ bool EchoCancellationImpl::is_aec3_enabled() const {
 
 std::string EchoCancellationImpl::GetExperimentsDescription() {
   rtc::CritScope cs(crit_capture_);
-  return aec3_enabled_ ? "AEC3" : "";
+  std::string description = (aec3_enabled_ ? "AEC3" : "");
+  if (refined_adaptive_filter_enabled_) {
+    description += ";RefinedAdaptiveFilter";
+  }
+  return description;
+}
+
+bool EchoCancellationImpl::is_refined_adaptive_filter_enabled() const {
+  rtc::CritScope cs(crit_capture_);
+  return refined_adaptive_filter_enabled_;
 }
 
 bool EchoCancellationImpl::is_extended_filter_enabled() const {
@@ -534,6 +543,8 @@ void EchoCancellationImpl::SetExtraOptions(const Config& config) {
     rtc::CritScope cs(crit_capture_);
     extended_filter_enabled_ = config.Get<ExtendedFilter>().enabled;
     delay_agnostic_enabled_ = config.Get<DelayAgnostic>().enabled;
+    refined_adaptive_filter_enabled_ =
+        config.Get<RefinedAdaptiveFilter>().enabled;
     aec3_enabled_ = config.Get<EchoCanceller3>().enabled;
   }
   Configure();
@@ -556,6 +567,9 @@ int EchoCancellationImpl::Configure() {
                                     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_);
     const int handle_error = WebRtcAec_set_config(canceller->state(), config);
     if (handle_error != AudioProcessing::kNoError) {
       error = AudioProcessing::kNoError;