Added support in the AEC for refined filter adaptation.

webrtc/modules/audio_processing/echo_cancellation_impl.h

Index: webrtc/modules/audio_processing/echo_cancellation_impl.h
diff --git a/webrtc/modules/audio_processing/echo_cancellation_impl.h b/webrtc/modules/audio_processing/echo_cancellation_impl.h
index fbc2bcc465383a99941a517788c11fea02058d0a..8ad0cdf3e4a2f844a3cb6d79d7b51c3e967d69e7 100644
--- a/webrtc/modules/audio_processing/echo_cancellation_impl.h
+++ b/webrtc/modules/audio_processing/echo_cancellation_impl.h
@@ -45,6 +45,7 @@ class EchoCancellationImpl : public EchoCancellation,
   bool is_delay_agnostic_enabled() const;
   bool is_extended_filter_enabled() const;
   bool is_next_generation_aec_enabled() const;
+  bool is_refined_adaptive_filter_enabled() const;
 
   // Reads render side data that has been queued on the render call.
   // Called holding the capture lock.
@@ -95,6 +96,7 @@ class EchoCancellationImpl : public EchoCancellation,
   bool extended_filter_enabled_ GUARDED_BY(crit_capture_);
   bool delay_agnostic_enabled_ GUARDED_BY(crit_capture_);
   bool next_generation_aec_enabled_ GUARDED_BY(crit_capture_);
+  bool refined_adaptive_filter_enabled_ GUARDED_BY(crit_capture_) = false;
 
   size_t render_queue_element_max_size_ GUARDED_BY(crit_render_)
       GUARDED_BY(crit_capture_);