Added volume adjust sound behind the flag.

media/audio/sounds/wav_audio_handler.h

-// Copyright 2013 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_SOUNDS_WAV_AUDIO_HANDLER_H_
-#define MEDIA_AUDIO_SOUNDS_WAV_AUDIO_HANDLER_H_
-
-#include "base/strings/string_piece.h"
-#include "media/base/media_export.h"
-
-namespace media {
-
-class AudioBus;
-
-// This class provides the input from wav file format.  See
-// https://ccrma.stanford.edu/courses/422/projects/WaveFormat/
-class MEDIA_EXPORT WavAudioHandler {
- public:
-  explicit WavAudioHandler(const base::StringPiece& wav_data);
-  virtual ~WavAudioHandler();
-
-  // Returns true when cursor points to the end of the track.
-  bool AtEnd(size_t cursor) const;
-
-  // Copies the audio data to |bus| starting from the |cursor| and in
-  // the case of success stores the number of written bytes in
-  // |bytes_written|. |bytes_written| should not be NULL.
-  bool CopyTo(AudioBus* bus, size_t cursor, size_t* bytes_written) const;
-
-  int size() const { return data_.size(); }
-  uint16 num_channels() const { return num_channels_; }
-  uint32 sample_rate() const { return sample_rate_; }
-  uint32 byte_rate() const { return byte_rate_; }
-  uint16 bits_per_sample() const { return bits_per_sample_; }
-
- private:
-  // Parses a chunk of wav format data. Returns the length of the chunk.
-  int ParseSubChunk(const base::StringPiece& data);
-
-  // Parses the 'fmt' section chunk and stores |params_|.
-  bool ParseFmtChunk(const base::StringPiece& data);
-
-  // Parses the 'data' section chunk and stores |data_|.
-  bool ParseDataChunk(const base::StringPiece& data);
-
-  // Data part of the |wav_data_|.
-  base::StringPiece data_;
-
-  uint16 num_channels_;
-  uint32 sample_rate_;
-  uint32 byte_rate_;
-  uint16 bits_per_sample_;
-  int bytes_per_sample_;
-  int bytes_per_frame_;
-};
-
-}  // namespace media
-
-#endif  // MEDIA_AUDIO_SOUNDS_WAV_AUDIO_HANDLER_H_