Make AudioOutputDevice restartable and reinitializable

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 3df825084a16ccd570dde3607ecf8c6166a7831b..b32124c69ce69d6d61b79954603fb9e5a2b13a77 100644
--- a/media/base/audio_renderer_mixer.cc
+++ b/media/base/audio_renderer_mixer.cc
@@ -191,6 +191,7 @@ AudioRendererMixer::AudioRendererMixer(
       last_play_time_(base::TimeTicks::Now()),
       // Initialize |playing_| to true since Start() results in an auto-play.
       playing_(true) {
+  printf("################ Creating new mixer.\n");
     DVLOG(1) << "AudioRendererMixer::AudioRendererMixer(),\n"
              << output_params_.AsHumanReadableString() << "mixer: " << this;
   // TODO(olka) we probably want to (a) start with a null sink and create a new
@@ -238,6 +239,29 @@ void AudioRendererMixer::ReconfigureSinkIfNeeded() {
       return;
   }
 
+#if 1
+  {
+//    base::AutoLock auto_lock(lock_);
+    if (audio_sink_) {
+      printf("################ Restarting sink for mixer.\n");
+      // Initialize |playing_| to true since Start() results in an auto-play.
+      last_play_time_ = base::TimeTicks::Now();
+      output_params_ = new_output_params;
+      audio_sink_->Stop();
+      audio_sink_->Initialize(output_params_, this);
+      audio_sink_->Start();
+      if (playing_)
+        audio_sink_->Play();
+      DVLOG(1) << "Sink reinitialized";
+      return;
+    }
+  }
+#endif
+
+  NOTREACHED();
+
+  printf("################ Creating new sink for mixer.\n");
+
   // To minimize possible glitches during the sink switch, first we initialize
   // the new sink, and after that we stop the current one. This may be a problem
   // on Mac since audio output won't switch to a larger buffer when there is IO