Remove AudioBuffersState usage in Chromium

media/audio/audio_buffers_state.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef MEDIA_AUDIO_AUDIO_BUFFERS_STATE_H_
-#define MEDIA_AUDIO_AUDIO_BUFFERS_STATE_H_
-
-#include "media/base/media_export.h"
-
-namespace media {
-
-// AudioBuffersState struct stores current state of audio buffers.
-// It is used for audio synchronization.
-struct MEDIA_EXPORT AudioBuffersState {
-  AudioBuffersState();
-  AudioBuffersState(int pending_bytes, int hardware_delay_bytes);
-
-  int total_bytes() {
-    return pending_bytes + hardware_delay_bytes;
-  }
-
-  // Number of bytes we currently have in our software buffer.
-  int pending_bytes;
-
-  // Number of bytes that have been written to the device, but haven't
-  // been played yet.
-  int hardware_delay_bytes;
-};
-
-}  // namespace media
-
-#endif  // MEDIA_AUDIO_AUDIO_BUFFERS_STATE_H_