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 71f02d6a3e426dfd80b886f24b6e5f0d9ba8ba86..bd5b283eca0bb23c447e830c22cae4c5946b2790 100644
--- a/webrtc/modules/audio_processing/aec/aec_core.h
+++ b/webrtc/modules/audio_processing/aec/aec_core.h
@@ -120,6 +120,12 @@ void WebRtcAec_enable_aec3(AecCore* self, int enable);
 // Returns 1 if the next generation aec is enabled and zero if disabled.
 int WebRtcAec_aec3_enabled(AecCore* self);
 
+// Turns on/off the refined adaptive filter feature.
+void WebRtcAec_enable_refined_adaptive_filter(AecCore* self, bool enable);
+
+// Returns whether the refined adaptive filter is enabled.
+bool 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);