Updated to Chrome 45 (2454) moved from SVN to git.

core/html/track/TrackEvent.idl

Index: core/html/track/TrackEvent.idl
diff --git a/core/html/track/TrackEvent.idl b/core/html/track/TrackEvent.idl
index 38ad03dcdd86414d1802890bc9275901dcc3c088..29066ef8178fda7731e77df78e5e9ffda48039e2 100644
--- a/core/html/track/TrackEvent.idl
+++ b/core/html/track/TrackEvent.idl
@@ -23,8 +23,10 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+// https://html.spec.whatwg.org/multipage/embedded-content.html#the-trackevent-interface
+
 [
-    EventConstructor,
+    Constructor(DOMString type, optional TrackEventInit eventInitDict),
 ] interface TrackEvent : Event {
-    [InitializedByEventConstructor, Custom=Getter] readonly attribute object track;
-};
+    readonly attribute (VideoTrack or AudioTrack or TextTrack)? track;
+};