Improved tuning of the adaptive level controller.

webrtc/modules/audio_processing/level_controller/gain_applier.h

Index: webrtc/modules/audio_processing/level_controller/gain_applier.h
diff --git a/webrtc/modules/audio_processing/level_controller/gain_applier.h b/webrtc/modules/audio_processing/level_controller/gain_applier.h
index decd1eb58c1c1d0a9b785be8c19c3cd83fdb9d92..2fc3543f845b4f1d3a558e235848eb5175f26268 100644
--- a/webrtc/modules/audio_processing/level_controller/gain_applier.h
+++ b/webrtc/modules/audio_processing/level_controller/gain_applier.h
@@ -30,8 +30,10 @@ class GainApplier {
  private:
   ApmDataDumper* const data_dumper_;
   float old_gain_ = 1.f;
-  float gain_change_step_size_ = 0.f;
-
+  float gain_increase_step_size_ = 0.f;
+  float gain_normal_decrease_step_size_ = 0.f;
+  float gain_saturated_decrease_step_size_ = 0.f;
+  bool last_frame_was_saturated_;
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(GainApplier);
 };