Add support for switching the audio output device for HTMLMediaElements.

media/renderers/renderer_impl.h

Index: media/renderers/renderer_impl.h
diff --git a/media/renderers/renderer_impl.h b/media/renderers/renderer_impl.h
index 56887c2a53c0861ddbd235d1d9a07903f788026a..80a5297d477691ac03feffce04cc57d6a0a9edf8 100644
--- a/media/renderers/renderer_impl.h
+++ b/media/renderers/renderer_impl.h
@@ -5,6 +5,7 @@
 #ifndef MEDIA_RENDERERS_RENDERER_IMPL_H_
 #define MEDIA_RENDERERS_RENDERER_IMPL_H_
 
+#include <string>
 #include <vector>
 
 #include "base/cancelable_callback.h"
@@ -20,6 +21,7 @@
 #include "media/base/media_export.h"
 #include "media/base/pipeline_status.h"
 #include "media/base/renderer.h"
+#include "url/gurl.h"
 
 namespace base {
 class SingleThreadTaskRunner;
@@ -59,6 +61,9 @@ class MEDIA_EXPORT RendererImpl : public Renderer {
   void StartPlayingFrom(base::TimeDelta time) final;
   void SetPlaybackRate(double playback_rate) final;
   void SetVolume(float volume) final;
+  void SwitchAudioOutputDevice(const std::string& device_id,
+                               const GURL& security_origin,
+                               const base::Callback<void(int)>& callback) final;
   base::TimeDelta GetMediaTime() final;
   bool HasAudio() final;
   bool HasVideo() final;