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

media/base/audio_renderer_mixer.cc

Index: media/base/audio_renderer_mixer.cc
diff --git a/media/base/audio_renderer_mixer.cc b/media/base/audio_renderer_mixer.cc
index 5b5fe49f0d27665f6839f61821bf6f8c37e77151..112d7ef8b7726ad4ecf379a99d58193ff761f0dd 100644
--- a/media/base/audio_renderer_mixer.cc
+++ b/media/base/audio_renderer_mixer.cc
@@ -71,16 +71,6 @@
   NOTREACHED();
 }
 
-void AudioRendererMixer::SwitchOutputDevice(
-    const std::string& device_id,
-    const GURL& security_origin,
-    const SwitchOutputDeviceCB& callback) {
-  DVLOG(1) << __FUNCTION__ << "(" << device_id << ", " << security_origin
-           << ")";
-  base::AutoLock auto_lock(lock_);
-  audio_sink_->SwitchOutputDevice(device_id, security_origin, callback);
-}
-
 int AudioRendererMixer::Render(AudioBus* audio_bus,
                                int audio_delay_milliseconds) {
   base::AutoLock auto_lock(lock_);