Added volume adjust sound behind the flag.

media/audio/sounds/audio_stream_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_AUDIO_STREAM_HANDLER_H_
 #define MEDIA_AUDIO_SOUNDS_AUDIO_STREAM_HANDLER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/strings/string_piece.h"
 #include "base/threading/non_thread_safe.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
-#include "media/audio/sounds/wav_audio_handler.h"
+#include "media/audio/sounds/wav_parser.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 class AudioManager;
+class WavReader;
 
 // This class sends a sound to the audio manager.
 class MEDIA_EXPORT AudioStreamHandler : public base::NonThreadSafe {
  public:
   class TestObserver {
    public:
     virtual ~TestObserver() {}
 
     // Following methods will be called only from the audio thread.
 
     // Called when AudioOutputStreamProxy::Start() was successfully called.
     virtual void OnPlay() = 0;
 
+    // Called when current sound is replayed.
+    virtual void OnReplay() = 0;
+
     // Called when AudioOutputStreamProxy::Stop() was successfully called.
     virtual void OnStop(size_t cursor) = 0;
   };
 
   // C-tor for AudioStreamHandler. |wav_data| should be a raw
   // uncompressed WAVE data which will be sent to the audio manager.
   explicit AudioStreamHandler(const base::StringPiece& wav_data);
   virtual ~AudioStreamHandler();
 
   // Returns true iff AudioStreamHandler is correctly initialized;
   bool IsInitialized() const;
 
   // Stops any previous playback if it's still not completed and
   // starts new playback. Volume level will be set according to
   // current settings and won't be changed during playback. Returns
   // true iff new playback was successfully started.
   bool Play();
 
   // Stops current playback.
   void Stop();
 
-  const WavAudioHandler& wav_audio_handler() const { return wav_audio_; }
+  const WavParser& wav_parser() const { return wav_parser_; }
 
  private:
   friend class AudioStreamHandlerTest;
   friend class SoundsManagerTest;
 
   class AudioStreamContainer;
 
   static void SetObserverForTesting(TestObserver* observer);
   static void SetAudioSourceForTesting(
       AudioOutputStream::AudioSourceCallback* source);
+  void SetWavReaderForTesting(WavReader* reader);
+  void AllowReplayOnceForTesting();
 
-  WavAudioHandler wav_audio_;
+  void StopAfterDelay();
+
+  WavParser wav_parser_;
   scoped_ptr<AudioStreamContainer> stream_;
 
   bool initialized_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioStreamHandler);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_SOUNDS_AUDIO_STREAM_HANDLER_H_