MediaStream API: Changing the device enumeration to be async

Source/modules/mediastream/MediaStreamTrack.h

Index: Source/modules/mediastream/MediaStreamTrack.h
diff --git a/Source/modules/mediastream/MediaStreamTrack.h b/Source/modules/mediastream/MediaStreamTrack.h
index 1bf3f38d23cff6cf76328b03b4681ef4a8234360..b7c8ee5afefb779dcf199c776bc5b3e8654a4186 100644
--- a/Source/modules/mediastream/MediaStreamTrack.h
+++ b/Source/modules/mediastream/MediaStreamTrack.h
@@ -41,6 +41,7 @@
 namespace WebCore {
 
 class MediaStreamComponent;
+class MediaStreamTrackSourcesCallback;
 
 class MediaStreamTrack : public RefCounted<MediaStreamTrack>, public ScriptWrappable, public ActiveDOMObject, public EventTarget, public MediaStreamSource::Observer {
 public:
@@ -58,7 +59,7 @@ public:
 
     String readyState() const;
 
-    static SourceInfoVector getSourceInfos(ScriptExecutionContext*, ExceptionCode&);
+    static void getSources(ScriptExecutionContext*, PassRefPtr<MediaStreamTrackSourcesCallback>, ExceptionCode&);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(mute);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(unmute);