Deliver change notifications to SourceBuffer track lists.

third_party/WebKit/Source/core/html/track/VideoTrack.cpp

Index: third_party/WebKit/Source/core/html/track/VideoTrack.cpp
diff --git a/third_party/WebKit/Source/core/html/track/VideoTrack.cpp b/third_party/WebKit/Source/core/html/track/VideoTrack.cpp
index a63a76207c624a7204689930266e03094424b435..cea588381b4571cd7e75541ee286cac4817d7adf 100644
--- a/third_party/WebKit/Source/core/html/track/VideoTrack.cpp
+++ b/third_party/WebKit/Source/core/html/track/VideoTrack.cpp
@@ -30,10 +30,8 @@ void VideoTrack::setSelected(bool selected)
 
     m_selected = selected;
 
-    if (mediaElement()) {
-        WebMediaPlayer::TrackId selectedTrackId = id();
-        mediaElement()->selectedVideoTrackChanged(selected ? &selectedTrackId : 0);
-    }
+    if (mediaElement())
+        mediaElement()->selectedVideoTrackChanged(this, selected);
 }
 
 const AtomicString& VideoTrack::alternativeKeyword()