Looking up device id by session id for AudioRendererMixerInput

content/renderer/media/audio_device_factory.h

Index: content/renderer/media/audio_device_factory.h
diff --git a/content/renderer/media/audio_device_factory.h b/content/renderer/media/audio_device_factory.h
index 73ce7ee88fcfdb0d8c7c57bd9bbbb6d5eaebb72f..a8b8cb8b3356575e9e6e559ace510baa2429d3f6 100644
--- a/content/renderer/media/audio_device_factory.h
+++ b/content/renderer/media/audio_device_factory.h
@@ -99,7 +99,10 @@ class CONTENT_EXPORT AudioDeviceFactory {
   // functions to provide alternate audio device implementations.
   // If the return value of either of these function is NULL, we fall back
   // on the default implementation.
-  virtual scoped_refptr<media::AudioRendererSink> CreateAudioRendererMixerSink(
+
+  // Creates a final sink in the rendering pipeline, which represents the actual
+  // output device.
+  virtual scoped_refptr<media::AudioRendererSink> CreateFinalAudioRendererSink(
       int render_frame_id,
       int sesssion_id,
       const std::string& device_id,
@@ -127,6 +130,12 @@ class CONTENT_EXPORT AudioDeviceFactory {
   // create the default AudioRendererSinks.
   static AudioDeviceFactory* factory_;
 
+  static scoped_refptr<media::AudioRendererSink> NewFinalAudioRendererSink(
+      int render_frame_id,
+      int session_id,
+      const std::string& device_id,
+      const url::Origin& security_origin);
+
   DISALLOW_COPY_AND_ASSIGN(AudioDeviceFactory);
 };