Revert "Update includes for webrtc/{base => rtc_base} rename (1/3)"

webrtc/modules/audio_processing/aec3/aec3_fft.cc

 /*
  *  Copyright (c) 2017 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/aec3/aec3_fft.h"
 
 #include <algorithm>
 
-#include "webrtc/rtc_base/checks.h"
+#include "webrtc/base/checks.h"
 
 namespace webrtc {
 
 // TODO(peah): Change x to be std::array once the rest of the code allows this.
 void Aec3Fft::ZeroPaddedFft(rtc::ArrayView<const float> x, FftData* X) const {
   RTC_DCHECK(X);
   RTC_DCHECK_EQ(kFftLengthBy2, x.size());
   std::array<float, kFftLength> fft;
   std::fill(fft.begin(), fft.begin() + kFftLengthBy2, 0.f);
   std::copy(x.begin(), x.end(), fft.begin() + kFftLengthBy2);
   Fft(&fft, X);
 }
 
 void Aec3Fft::PaddedFft(rtc::ArrayView<const float> x,
                         rtc::ArrayView<float> x_old,
                         FftData* X) const {
   RTC_DCHECK(X);
   RTC_DCHECK_EQ(kFftLengthBy2, x.size());
   RTC_DCHECK_EQ(kFftLengthBy2, x_old.size());
   std::array<float, kFftLength> fft;
   std::copy(x_old.begin(), x_old.end(), fft.begin());
   std::copy(x.begin(), x.end(), fft.begin() + x_old.size());
   std::copy(x.begin(), x.end(), x_old.begin());
   Fft(&fft, X);
 }
 
 }  // namespace webrtc