Renderer side audio device change wip...

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 cb9b022cdb6f2bfc666ac3aadbcd90d212efabf2..65fe310be7cf1b12615a2e8e87f4864eb9a86d59 100644
--- a/media/base/audio_renderer_mixer.cc
+++ b/media/base/audio_renderer_mixer.cc
@@ -20,7 +20,9 @@ AudioRendererMixer::AudioRendererMixer(
       pause_delay_(base::TimeDelta::FromSeconds(kPauseDelaySeconds)),
       last_play_time_(base::Time::Now()),
       // Initialize |playing_| to true since Start() results in an auto-play.
-      playing_(true) {
+      playing_(true),
+      input_params_(input_params),
+      output_params_(output_params) {
   audio_sink_->Initialize(output_params, this);
   audio_sink_->Start();
 }
@@ -90,4 +92,15 @@ void AudioRendererMixer::OnRenderError() {
   }
 }
 
+void AudioRendererMixer::OnDeviceChange() {
+  base::AutoLock auto_lock(mixer_inputs_lock_);
+
+  // Iterate and remove elements which receive an updated mixer.
+  for (AudioRendererMixerInputSet::iterator it = mixer_inputs_.begin();
+       it != mixer_inputs_.end(); ++it) {
+    (*it)->OnDeviceChange();
+  }
+}
+
+
 }  // namespace media