Switching audio clients to using RestartableAudioRendererSink interface as a sink.

content/renderer/media/audio_renderer_mixer_manager.cc

Index: content/renderer/media/audio_renderer_mixer_manager.cc
diff --git a/content/renderer/media/audio_renderer_mixer_manager.cc b/content/renderer/media/audio_renderer_mixer_manager.cc
index c96b83f60b316a42f8806c9869cc40d37e1d8739..901d368fbb1ff582b9728fe52f4840f0f4c8bcd7 100644
--- a/content/renderer/media/audio_renderer_mixer_manager.cc
+++ b/content/renderer/media/audio_renderer_mixer_manager.cc
@@ -35,7 +35,10 @@ media::AudioRendererMixerInput* AudioRendererMixerManager::CreateInput(
                  source_render_frame_id),
       base::Bind(&AudioRendererMixerManager::RemoveMixer,
                  base::Unretained(this), source_render_frame_id),
-      device_id, security_origin);
+      base::Bind(&AudioRendererMixerManager::GetHardwareOutputParams,
+                 source_render_frame_id, 0),  // Session id is 0.
+      device_id,
+      security_origin);
 }
 
 void AudioRendererMixerManager::SetAudioRendererSinkForTesting(
@@ -137,6 +140,31 @@ void AudioRendererMixerManager::RemoveMixer(
   }
 }
 
+// static
+media::AudioParameters AudioRendererMixerManager::GetHardwareOutputParams(
+    int render_frame_id,
+    int session_id,
+    const std::string& device_id,
+    const url::Origin& security_origin) {
+  media::AudioParameters params;  // Invalid parameters to return by default.
+
+  // TODO(olka): first try to lookup an existing device (cached or belonging

[Henrik Grunell, 2016/02/15 12:21:17]

Nit: first -> First

[o1ka, 2016/02/17 17:40:44]

Done.

+  // to some mixer) and reuse it. http://crbug.com/586161
+
+  // AudioOutputDevice is the only interface we have to communicate with output
+  // device via IPC. So, that's how we get the parameters when there is no
+  // AudioOutputDevice:
+  scoped_refptr<media::AudioOutputDevice> device =
+      AudioDeviceFactory::NewOutputDevice(render_frame_id, session_id,
+                                          device_id, security_origin);
+
+  if (device->GetDeviceStatus() == media::OUTPUT_DEVICE_STATUS_OK)
+    params = device->GetOutputParameters();
+
+  device->Stop();  // TODO(olka): temporary cash for future reuse.

[Henrik Grunell, 2016/02/15 12:21:17]

Seems like the same todo as above. If yes, remove this one.

[o1ka, 2016/02/17 17:40:44]

Not the same/ The first is about using a cached device, and the second is about
cashing a created device.

+  return params;
+}
+
 AudioRendererMixerManager::MixerKey::MixerKey(
     int source_render_frame_id,
     const media::AudioParameters& params,