Add support for the audio-output-device switching IPC mechanism to the renderer lower layers (media…

media/audio/clockless_audio_sink.h

Index: media/audio/clockless_audio_sink.h
diff --git a/media/audio/clockless_audio_sink.h b/media/audio/clockless_audio_sink.h
index 075c55a50d72285a88d143a57d55a8f1c3f4e5ba..c0c1cb9b1abe4e70bc06aefead22a9ab0d1a2a9d 100644
--- a/media/audio/clockless_audio_sink.h
+++ b/media/audio/clockless_audio_sink.h
@@ -5,6 +5,8 @@
 #ifndef MEDIA_AUDIO_CLOCKLESS_AUDIO_SINK_H_
 #define MEDIA_AUDIO_CLOCKLESS_AUDIO_SINK_H_
 
+#include <string>
+
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "media/base/audio_renderer_sink.h"
@@ -32,6 +34,10 @@ class MEDIA_EXPORT ClocklessAudioSink
   void Pause() override;
   void Play() override;
   bool SetVolume(double volume) override;
+  void SwitchOutputDevice(
+      const std::string& device_id,
+      const GURL& security_origin,
+      scoped_ptr<SwitchOutputDeviceCallbackRunner> callback_runner) override;
 
   // Returns the time taken to consume all the audio.
   base::TimeDelta render_time() { return playback_time_; }