Chrome roll 202464->204370.

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 367774f4aeef77318f6fa12dac0e2c4b2bd09033..a3f036331d39a8aecebff75ec5cf551864b15bac 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -9097,6 +9097,23 @@ class ScrollAlignment {
 // BSD-style license that can be found in the LICENSE file.
 
 
+@DomName('ElementTimeControl')
+@Unstable
+abstract class ElementTimeControl {
+
+  void beginElement();
+
+  void beginElementAt(num offset);
+
+  void endElement();
+
+  void endElementAt(num offset);
+}
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+
 @DomName('ElementTraversal')
 @Unstable
 abstract class ElementTraversal {