Revert of Add support for the audio-output-device switching IPC mechanism to the renderer lower...

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 2251b007c56bfaa1cd327d3afde3258ed9eb8e3f..075c55a50d72285a88d143a57d55a8f1c3f4e5ba 100644
--- a/media/audio/clockless_audio_sink.h
+++ b/media/audio/clockless_audio_sink.h
@@ -4,8 +4,6 @@
 
 #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"
@@ -34,9 +32,6 @@
   void Pause() override;
   void Play() override;
   bool SetVolume(double volume) override;
-  void SwitchOutputDevice(const std::string& device_id,
-                          const GURL& security_origin,
-                          const SwitchOutputDeviceCB& callback) override;
 
   // Returns the time taken to consume all the audio.
   base::TimeDelta render_time() { return playback_time_; }