Added support in the AEC for refined filter adaptation.

webrtc/modules/audio_processing/aec/aec_core.h

Index: webrtc/modules/audio_processing/aec/aec_core.h
diff --git a/webrtc/modules/audio_processing/aec/aec_core.h b/webrtc/modules/audio_processing/aec/aec_core.h
index 75925fc92921d641c940499dad561826af6f2f25..618b1659108fef847286a916d3104624657998c8 100644
--- a/webrtc/modules/audio_processing/aec/aec_core.h
+++ b/webrtc/modules/audio_processing/aec/aec_core.h
@@ -117,6 +117,12 @@ void WebRtcAec_enable_next_generation_aec(AecCore* self, int enable);
 // Returns 1 if the next generation aec is enabled and zero if disabled.
 int WebRtcAec_next_generation_aec_enabled(AecCore* self);
 
+// Turns on/off the refined adaptive filter feature.
+void WebRtcAec_enable_refined_adaptive_filter(AecCore* self, int enable);
+
+// Returns whether the refined adaptive filter is enabled.
+int WebRtcAec_refined_adaptive_filter(const AecCore* self);
+
 // Enables or disables extended filter mode. Non-zero enables, zero disables.
 void WebRtcAec_enable_extended_filter(AecCore* self, int enable);