Provide DartDomNameOfAttribute

client/html/dartium/html_dartium.dart

Index: client/html/dartium/html_dartium.dart
diff --git a/client/html/dartium/html_dartium.dart b/client/html/dartium/html_dartium.dart
index 4421359392bdce9bd5942dae568307309ebf82a7..e5ae4bdac962e9a02a8cf5a9631ad63f13cf1041 100644
--- a/client/html/dartium/html_dartium.dart
+++ b/client/html/dartium/html_dartium.dart
@@ -18675,6 +18675,10 @@ class _TouchListImpl extends _DOMTypeBase implements TouchList {
 class _TrackElementImpl extends _ElementImpl implements TrackElement {
   _TrackElementImpl._wrap(ptr) : super._wrap(ptr);
 
+  bool get default() => _wrap(_ptr.defaultValue);
+
+  void set default(bool value) { _ptr.defaultValue = _unwrap(value); }
+
   String get kind() => _wrap(_ptr.kind);
 
   void set kind(String value) { _ptr.kind = _unwrap(value); }
@@ -33408,6 +33412,8 @@ interface TrackElement extends Element {
 
   static final int NONE = 0;
 
+  bool defaultValue;
+
   String kind;
 
   String label;