Changed the delay estimator to be built using C++

webrtc/modules/audio_processing/aecm/aecm_core_c.cc

 /*
  *  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.
  */
 
 #include "webrtc/modules/audio_processing/aecm/aecm_core.h"
 
 #include <assert.h>
 #include <stddef.h>
 #include <stdlib.h>
 
 extern "C" {
 #include "webrtc/common_audio/ring_buffer.h"
 #include "webrtc/common_audio/signal_processing/include/real_fft.h"
 }
 #include "webrtc/modules/audio_processing/aecm/echo_control_mobile.h"
+#include "webrtc/modules/audio_processing/utility/delay_estimator_wrapper.h"
 extern "C" {
-#include "webrtc/modules/audio_processing/utility/delay_estimator_wrapper.h"
 #include "webrtc/system_wrappers/include/cpu_features_wrapper.h"
 }
 #include "webrtc/typedefs.h"
 
 // Square root of Hanning window in Q14.
 static const ALIGN8_BEG int16_t WebRtcAecm_kSqrtHanning[] ALIGN8_END = {
   0, 399, 798, 1196, 1594, 1990, 2386, 2780, 3172,
   3562, 3951, 4337, 4720, 5101, 5478, 5853, 6224,
   6591, 6954, 7313, 7668, 8019, 8364, 8705, 9040,
   9370, 9695, 10013, 10326, 10633, 10933, 11227, 11514,
@@ skipping 725 matching lines @@
         13);
   }
   uImag[PART_LEN] = 0;
 
   for (i = 0; i < PART_LEN1; i++)
   {
     out[i].real = WebRtcSpl_AddSatW16(out[i].real, uReal[i]);
     out[i].imag = WebRtcSpl_AddSatW16(out[i].imag, uImag[i]);
   }
 }