Replaced the wav file dumping functionality in aec_core.c with the newly added corresponding macros

webrtc/modules/audio_processing/aec/aec_core_internal.h

 /*
  *  Copyright (c) 2013 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 148 matching lines @@
 
   // Number of times we've restarted dumping; used to pick new dump file names
   // each time.
   int debug_dump_count;
 
   RingBuffer* far_time_buf;
   rtc_WavWriter* farFile;
   rtc_WavWriter* nearFile;
   rtc_WavWriter* outFile;
   rtc_WavWriter* outLinearFile;
+  FILE* e_fft_file;
 #endif
 };
 
 typedef void (*WebRtcAecFilterFar)(AecCore* aec, float yf[2][PART_LEN1]);
 extern WebRtcAecFilterFar WebRtcAec_FilterFar;
 typedef void (*WebRtcAecScaleErrorSignal)(AecCore* aec, float ef[2][PART_LEN1]);
 extern WebRtcAecScaleErrorSignal WebRtcAec_ScaleErrorSignal;
 typedef void (*WebRtcAecFilterAdaptation)(AecCore* aec,
                                           float* fft,
                                           float ef[2][PART_LEN1]);
@@ skipping 13 matching lines @@
 
 typedef void (*WebRtcAecSubBandCoherence)(AecCore* aec,
                                           float efw[2][PART_LEN1],
                                           float xfw[2][PART_LEN1],
                                           float* fft,
                                           float* cohde,
                                           float* cohxd);
 extern WebRtcAecSubBandCoherence WebRtcAec_SubbandCoherence;
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_AEC_CORE_INTERNAL_H_