Very early implementation for HTMLMediaElement / Web Audio API integration

content/renderer/media/audio_device.h

Index: content/renderer/media/audio_device.h
===================================================================
--- content/renderer/media/audio_device.h	(revision 97713)
+++ content/renderer/media/audio_device.h	(working copy)
@@ -54,22 +54,15 @@
 #include "base/shared_memory.h"
 #include "base/threading/simple_thread.h"
 #include "content/renderer/media/audio_message_filter.h"
+#include "media/filters/audio_renderer_sink.h"
 
 struct AudioParameters;
 
 class AudioDevice
     : public AudioMessageFilter::Delegate,
       public base::DelegateSimpleThread::Delegate,
-      public base::RefCountedThreadSafe<AudioDevice> {
+      public media::AudioRendererSink {
  public:
-  class RenderCallback {
-   public:
-    virtual void Render(const std::vector<float*>& audio_data,
-                        size_t number_of_frames,
-                        size_t audio_delay_milliseconds) = 0;
-   protected:
-    virtual ~RenderCallback() {}
-  };
 
   // Methods called on main render thread -------------------------------------
   AudioDevice(size_t buffer_size,
@@ -79,14 +72,14 @@
   virtual ~AudioDevice();
 
   // Starts audio playback. Returns |true| on success.
-  bool Start();
+  virtual bool Start();
 
   // Stops audio playback. Returns |true| on success.
-  bool Stop();
+  virtual bool Stop();
 
   // Sets the playback volume, with range [0.0, 1.0] inclusive.
   // Returns |true| on success.
-  bool SetVolume(double volume);
+  virtual bool SetVolume(double volume);
 
   // Gets the playback volume, with range [0.0, 1.0] inclusive.
   // Returns |true| on success.