Renderer side audio device change wip...

media/base/audio_renderer_sink.h

Index: media/base/audio_renderer_sink.h
diff --git a/media/base/audio_renderer_sink.h b/media/base/audio_renderer_sink.h
index ad61c4b0d95a1442d96085a4b952d3b91c85a900..acd73d1afda9822846bbf68c7af3a01fc78835a6 100644
--- a/media/base/audio_renderer_sink.h
+++ b/media/base/audio_renderer_sink.h
@@ -35,6 +35,10 @@ class AudioRendererSink
     // Signals an error has occurred.
     virtual void OnRenderError() = 0;
 
+    // Optional method for handling device change notifications from the
+    // browser.
+    virtual void OnDeviceChange() {};
+
    protected:
     virtual ~RenderCallback() {}
   };