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

webrtc/modules/audio_mixer/audio_frame_manipulator.cc

 /*
  *  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.
  */
 
+#include "webrtc/audio/utility/audio_frame_operations.h"
+#include "webrtc/base/checks.h"
 #include "webrtc/modules/audio_mixer/audio_frame_manipulator.h"
-#include "webrtc/audio/utility/audio_frame_operations.h"
 #include "webrtc/modules/include/module_common_types.h"
-#include "webrtc/rtc_base/checks.h"
 
 namespace webrtc {
 
 uint32_t AudioMixerCalculateEnergy(const AudioFrame& audio_frame) {
   if (audio_frame.muted()) {
     return 0;
   }
 
   uint32_t energy = 0;
   const int16_t* frame_data = audio_frame.data();
@@ skipping 31 matching lines @@
 void RemixFrame(size_t target_number_of_channels, AudioFrame* frame) {
   RTC_DCHECK_GE(target_number_of_channels, 1);
   RTC_DCHECK_LE(target_number_of_channels, 2);
   if (frame->num_channels_ == 1 && target_number_of_channels == 2) {
     AudioFrameOperations::MonoToStereo(frame);
   } else if (frame->num_channels_ == 2 && target_number_of_channels == 1) {
     AudioFrameOperations::StereoToMono(frame);
   }
 }
 }  // namespace webrtc