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..a2977887f5ec3d63903c1b63cbdd83ebdd8c47a6 100644
--- a/content/renderer/media/audio_device_factory.h
+++ b/content/renderer/media/audio_device_factory.h
@@ -79,7 +79,7 @@ class CONTENT_EXPORT AudioDeviceFactory {
                                  const url::Origin& security_origin);
 
   // A helper to get device info in the absence of AudioOutputDevice.
-  static media::OutputDeviceInfo GetOutputDeviceInfo(
+  static const media::OutputDeviceInfo GetOutputDeviceInfo(

[tommi (sloooow) - chröme, 2016/04/08 13:47:47]

why this change?  the caller can make the variable const if required, right?
...or did you mean to return by const ref?

[o1ka, 2016/04/08 19:07:25]

No-no, no ref. Removing const to avoid confusion.

       int render_frame_id,
       int session_id,
       const std::string& device_id,
@@ -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);
 };