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

media/base/audio_renderer_mixer_input.cc

Index: media/base/audio_renderer_mixer_input.cc
diff --git a/media/base/audio_renderer_mixer_input.cc b/media/base/audio_renderer_mixer_input.cc
index 6194f21ca94d8c1e2a0fc22873cfdef2c82a7af7..ab9f0a7ecab20e0d2c6ddae12fc6bcc690009960 100644
--- a/media/base/audio_renderer_mixer_input.cc
+++ b/media/base/audio_renderer_mixer_input.cc
@@ -5,7 +5,6 @@
 #include "media/base/audio_renderer_mixer_input.h"
 
 #include "base/bind.h"
-#include "base/location.h"
 #include "base/logging.h"
 #include "media/base/audio_renderer_mixer.h"
 
@@ -95,19 +94,6 @@
   return true;
 }
 
-void AudioRendererMixerInput::SwitchOutputDevice(
-    const std::string& device_id,
-    const GURL& security_origin,
-    const SwitchOutputDeviceCB& callback) {
-  DVLOG(1) << __FUNCTION__
-           << "(" << device_id << ", " << security_origin << ")";
-  if (mixer_) {
-    mixer_->SwitchOutputDevice(device_id, security_origin, callback);
-  } else {
-    callback.Run(SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_SUPPORTED);
-  }
-}
-
 double AudioRendererMixerInput::ProvideInput(AudioBus* audio_bus,
                                              base::TimeDelta buffer_delay) {
   int frames_filled = callback_->Render(