Added volume adjust sound behind the flag.

media/audio/sounds/wav_audio_handler.h

Index: media/audio/sounds/wav_audio_handler.h
diff --git a/media/audio/sounds/wav_audio_handler.h b/media/audio/sounds/wav_audio_handler.h
index a2c3e02365002133fdd84bd01451ef0c421d4887..82b5cc5f842d53553d922a9c5609d7a9ba65e775 100644
--- a/media/audio/sounds/wav_audio_handler.h
+++ b/media/audio/sounds/wav_audio_handler.h
@@ -6,6 +6,8 @@
 #define MEDIA_AUDIO_SOUNDS_WAV_AUDIO_HANDLER_H_
 
 #include "base/strings/string_piece.h"
+#include "base/time/time.h"
+#include "media/audio/audio_parameters.h"
 #include "media/base/media_export.h"
 
 namespace media {
@@ -27,11 +29,8 @@ class MEDIA_EXPORT WavAudioHandler {
   // |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_; }
+  const AudioParameters& params() const { return params_; }
+  const base::StringPiece& data() const { return data_; }
 
  private:
   // Parses a chunk of wav format data. Returns the length of the chunk.
@@ -46,12 +45,11 @@ class MEDIA_EXPORT WavAudioHandler {
   // Data part of the |wav_data_|.
   base::StringPiece data_;
 
+  AudioParameters params_;
+
   uint16 num_channels_;
   uint32 sample_rate_;
-  uint32 byte_rate_;
   uint16 bits_per_sample_;
-  int bytes_per_sample_;
-  int bytes_per_frame_;
 };
 
 }  // namespace media