Renaming Element.dataAttributes to Element.dataset.

tools/dom/templates/html/impl/impl_Element.darttemplate

Index: tools/dom/templates/html/impl/impl_Element.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_Element.darttemplate b/tools/dom/templates/html/impl/impl_Element.darttemplate
index 5499b22cfaa3c634021f5f0c715f72b505882a14..f4f9de1c083215a2c8b0dadb52e8fd550c406d6b 100644
--- a/tools/dom/templates/html/impl/impl_Element.darttemplate
+++ b/tools/dom/templates/html/impl/impl_Element.darttemplate
@@ -669,20 +669,20 @@ $(ANNOTATIONS)abstract class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
    *
    * Would be accessed in Dart as:
    *
-   *     var value = element.dataAttributes['myRandomValue'];
+   *     var value = element.dataset['myRandomValue'];
    *
    * See also:
    *
    * * [Custom data attributes](http://www.w3.org/TR/html5/global-attributes.html#custom-data-attribute)
    */

[Jacob, 2013/02/14 18:16:36]

we should think about whether the regular browser dataset implementation should
be used on modern browsers rather than the existing polyfill.

-  Map<String, String> get dataAttributes =>
+  Map<String, String> get dataset =>
     new _DataAttributeMap(attributes);
 
-  void set dataAttributes(Map<String, String> value) {
-    final dataAttributes = this.dataAttributes;
-    dataAttributes.clear();
+  void set dataset(Map<String, String> value) {
+    final data = this.dataset;
+    data.clear();
     for (String key in value.keys) {
-      dataAttributes[key] = value[key];
+      data[key] = value[key];
     }
   }