Revert of Moved ring-buffer related files from common_audio to audio_processing

webrtc/modules/audio_processing/aecm/aecm_core.h

 /*
  *  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.
  */
 
 // Performs echo control (suppression) with fft routines in fixed-point.
 
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AECM_AECM_CORE_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_AECM_AECM_CORE_H_
 
+#include "webrtc/common_audio/ring_buffer.h"
 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
 #include "webrtc/modules/audio_processing/aecm/aecm_defines.h"
-#include "webrtc/modules/audio_processing/utility/ring_buffer.h"
 #include "webrtc/typedefs.h"
 
 #ifdef _MSC_VER  // visual c++
 #define ALIGN8_BEG __declspec(align(8))
 #define ALIGN8_END
 #else  // gcc or icc
 #define ALIGN8_BEG
 #define ALIGN8_END __attribute__((aligned(8)))
 #endif
 
@@ skipping 396 matching lines @@
 #if defined(MIPS_DSP_R1_LE)
 void WebRtcAecm_StoreAdaptiveChannel_mips(AecmCore* aecm,
                                           const uint16_t* far_spectrum,
                                           int32_t* echo_est);
 
 void WebRtcAecm_ResetAdaptiveChannel_mips(AecmCore* aecm);
 #endif
 #endif
 
 #endif