Support for audio output devices for getMediaDevices.

content/browser/renderer_host/media/media_stream_manager.h

Index: content/browser/renderer_host/media/media_stream_manager.h
diff --git a/content/browser/renderer_host/media/media_stream_manager.h b/content/browser/renderer_host/media/media_stream_manager.h
index e437a8286670c5867862bd6b614623de51a2097a..2d2ec87f2eb406a0cdb51b8e351bf7949be49ecd 100644
--- a/content/browser/renderer_host/media/media_stream_manager.h
+++ b/content/browser/renderer_host/media/media_stream_manager.h
@@ -246,6 +246,11 @@ class CONTENT_EXPORT MediaStreamManager
 
   void DoEnumerateDevices(const std::string& label);
 
+  // Enumerates audio output devices. No caching.
+  void EnumerateAudioOutputDevices(const std::string& label);
+
+  void AudioOutputDevicesEnumerated(const StreamDeviceInfoArray& devices);
+
   // Helpers.
   // Checks if all devices that was requested in the request identififed by
   // |label| has been opened and set the request state accordingly.
@@ -353,7 +358,8 @@ class CONTENT_EXPORT MediaStreamManager
                                StreamDeviceInfoArray devices,
                                gfx::NativeViewId window_id);
 
-  // Task runner shared by VideoCaptureManager and AudioInputDeviceManager.
+  // Task runner shared by VideoCaptureManager and AudioInputDeviceManager and
+  // used for enumerating audio output devices.
   // Note: Enumeration tasks may take seconds to complete so must never be run
   // on any of the BrowserThreads (UI, IO, etc).  See http://crbug.com/256945.
   scoped_refptr<base::SingleThreadTaskRunner> device_task_runner_;