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

webrtc/modules/audio_processing/test/echo_canceller_test_tools.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/test/echo_canceller_test_tools.h"
 
-#include "webrtc/rtc_base/checks.h"
+#include "webrtc/base/checks.h"
 
 namespace webrtc {
 
 void RandomizeSampleVector(Random* random_generator, rtc::ArrayView<float> v) {
   for (auto& v_k : v) {
     v_k = 2 * 32767.f * random_generator->Rand<float>() - 32767.f;
   }
 }
 
 template <typename T>
 void DelayBuffer<T>::Delay(rtc::ArrayView<const T> x,
                            rtc::ArrayView<T> x_delayed) {
   RTC_DCHECK_EQ(x.size(), x_delayed.size());
   if (buffer_.size() == 0) {
     std::copy(x.begin(), x.end(), x_delayed.begin());
   } else {
     for (size_t k = 0; k < x.size(); ++k) {
       x_delayed[k] = buffer_[next_insert_index_];
       buffer_[next_insert_index_] = x[k];
       next_insert_index_ = (next_insert_index_ + 1) % buffer_.size();
     }
   }
 }
 
 template class DelayBuffer<float>;
 template class DelayBuffer<int>;
 }  // namespace webrtc