Reland of Moved ring-buffer related files from common_audio to audio_processing"

webrtc/modules/audio_processing/utility/ring_buffer.c

 /*
  *  Copyright (c) 2011 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.
  */
 
 // A ring buffer to hold arbitrary data. Provides no thread safety. Unless
 // otherwise specified, functions return 0 on success and -1 on error.
 
-#include "webrtc/common_audio/ring_buffer.h"
+#include "webrtc/modules/audio_processing/utility/ring_buffer.h"
 
 #include <stddef.h>  // size_t
 #include <stdlib.h>
 #include <string.h>
 
 enum Wrap {
   SAME_WRAP,
   DIFF_WRAP
 };
 
@@ skipping 213 matching lines @@
   }
 }
 
 size_t WebRtc_available_write(const RingBuffer* self) {
   if (!self) {
     return 0;
   }
 
   return self->element_count - WebRtc_available_read(self);
 }