Add support for the audio-output-device switching IPC mechanism to the renderer lower layers (media…

media/audio/clockless_audio_sink.cc

Index: media/audio/clockless_audio_sink.cc
diff --git a/media/audio/clockless_audio_sink.cc b/media/audio/clockless_audio_sink.cc
index 44e9adb4451f0c609e5db94f77a7b87c6e860f64..4f593ffb71550d0747fafdf1a143e7c99e7c7918 100644
--- a/media/audio/clockless_audio_sink.cc
+++ b/media/audio/clockless_audio_sink.cc
@@ -4,6 +4,9 @@
 
 #include "media/audio/clockless_audio_sink.h"
 
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/simple_thread.h"
 
 namespace media {
@@ -105,4 +108,11 @@ bool ClocklessAudioSink::SetVolume(double volume) {
   return volume == 0.0;
 }
 
+void ClocklessAudioSink::SwitchOutputDevice(
+    const std::string& device_id,
+    const GURL& security_origin,
+    const SwitchOutputDeviceCB& callback) {
+  callback.Run(SWITCH_OUTPUT_DEVICE_RESULT_ERROR_OBSOLETE);
+}
+
 }  // namespace media