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

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 112d7ef8b7726ad4ecf379a99d58193ff761f0dd..888f9645e207925136f1a8726477d191e333145a 100644
--- a/media/base/audio_renderer_mixer.cc
+++ b/media/base/audio_renderer_mixer.cc
@@ -71,6 +71,17 @@ void AudioRendererMixer::RemoveErrorCallback(const base::Closure& error_cb) {
   NOTREACHED();
 }
 
+void AudioRendererMixer::SwitchOutputDevice(
+    const std::string& device_id,
+    const GURL& security_origin,
+    scoped_ptr<SwitchOutputDeviceCallbackRunner> callback_runner) {
+  DVLOG(1) << __FUNCTION__
+           << "(" << device_id << ", " << security_origin << ")";
+  base::AutoLock auto_lock(lock_);
+  audio_sink_->SwitchOutputDevice(device_id, security_origin,
+                                  callback_runner.Pass());
+}
+
 int AudioRendererMixer::Render(AudioBus* audio_bus,
                                int audio_delay_milliseconds) {
   base::AutoLock auto_lock(lock_);