Removed unused state variable in the AEC

webrtc/modules/audio_processing/aec/aec_core.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 208 matching lines @@
   int delay_histogram[kHistorySizeBlocks];
   int num_delay_values;
   int delay_median;
   int delay_std;
   float fraction_poor_delays;
   int delay_logging_enabled;
   void* delay_estimator_farend;
   void* delay_estimator;
   // Variables associated with delay correction through signal based delay
   // estimation feedback.
-  int signal_delay_correction;
   int previous_delay;
   int delay_correction_count;
   int shift_offset;
   float delay_quality_threshold;
   int frame_count;
 
   // 0 = delay agnostic mode (signal based delay correction) disabled.
   // Otherwise enabled.
   int delay_agnostic_enabled;
   // 1 = extended filter mode enabled, 0 = disabled.
@@ skipping 92 matching lines @@
 int WebRtcAec_system_delay(AecCore* self);
 
 // Sets the |system_delay| to |value|.  Note that if the value is changed
 // improperly, there can be a performance regression.  So it should be used with
 // care.
 void WebRtcAec_SetSystemDelay(AecCore* self, int delay);
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_AEC_CORE_H_