Major updates to the echo removal functionality in AEC3

webrtc/modules/audio_processing/aec3/output_selector.h

Index: webrtc/modules/audio_processing/aec3/output_selector.h
diff --git a/webrtc/modules/audio_processing/aec3/output_selector.h b/webrtc/modules/audio_processing/aec3/output_selector.h
index 943e547cde5054f7bb703637ec08c8304a879f92..505bb3f19e0984067cda5d36b3a1d0e0bef7e148 100644
--- a/webrtc/modules/audio_processing/aec3/output_selector.h
+++ b/webrtc/modules/audio_processing/aec3/output_selector.h
@@ -24,7 +24,8 @@ class OutputSelector {
   ~OutputSelector();
 
   // Forms the most appropriate output signal.
-  void FormLinearOutput(rtc::ArrayView<const float> subtractor_output,
+  void FormLinearOutput(bool use_subtractor_output,
+                        rtc::ArrayView<const float> subtractor_output,
                         rtc::ArrayView<float> capture);
 
   // Returns true if the linear aec output is the one used.
@@ -32,7 +33,6 @@ class OutputSelector {
 
  private:
   bool use_subtractor_output_ = false;
-  int output_change_counter_ = 0;
   RTC_DISALLOW_COPY_AND_ASSIGN(OutputSelector);
 };