Add support for switching the audio output device for HTMLMediaElements.

media/base/fake_audio_renderer_sink.cc

Index: media/base/fake_audio_renderer_sink.cc
diff --git a/media/base/fake_audio_renderer_sink.cc b/media/base/fake_audio_renderer_sink.cc
index d42db6de1b9a7eba16f42c4417c56aa218112576..6d67a5b86ea6c1000cb4de1f6e84e378fb5d2080 100644
--- a/media/base/fake_audio_renderer_sink.cc
+++ b/media/base/fake_audio_renderer_sink.cc
@@ -52,6 +52,12 @@ bool FakeAudioRendererSink::SetVolume(double volume) {
   return true;
 }
 
+void FakeAudioRendererSink::SwitchOutputDevice(
+    const std::string& device_id,
+    const GURL& security_origin,
+    const base::Callback<void(int)>& callback) { }

[miu, 2015/06/03 21:01:01]

ditto: Run the callback to "fake" that something happened.

+
+
 bool FakeAudioRendererSink::Render(AudioBus* dest, int audio_delay_milliseconds,
                                    int* frames_written) {
   if (state_ != kPlaying)