sdk/lib/html/dartium/html_dartium.dart

Index: sdk/lib/html/dartium/html_dartium.dart
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index 48950cec8a4cddb4778a189df064e808fee6c76e..81e27d892f1527d17c53341392caf5be1b4a732c 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -10289,6 +10289,7 @@ abstract class Element extends Node implements ParentNode, ChildNode {
    * This method is the Dart equivalent to jQuery's
    * [offset](http://api.jquery.com/offset/) method.
    */
+  @Experimental()
   Point get documentOffset => offsetTo(document.documentElement);
 
   /**
@@ -10302,6 +10303,7 @@ abstract class Element extends Node implements ParentNode, ChildNode {
    * element is _not_ an offset parent or transitive offset parent to this
    * element, an [ArgumentError] is thrown.
    */
+  @Experimental()
   Point offsetTo(Element parent) {
     return Element._offsetToHelper(this, parent);
   }