Revert "Revert "Implement Element.matches(selectors)""

Source/core/dom/Element.idl

Index: Source/core/dom/Element.idl
diff --git a/Source/core/dom/Element.idl b/Source/core/dom/Element.idl
index ad01c3fa846084a4e99fc8701afda857d837e874..1cf710c9d0127b4b4b918ac6402a151ed99732d9 100644
--- a/Source/core/dom/Element.idl
+++ b/Source/core/dom/Element.idl
@@ -62,6 +62,8 @@
     [TreatReturnedNullStringAs=Null, TreatNullAs=NullString, PerWorldBindings, RaisesException=Setter] attribute DOMString prefix;
     [TreatReturnedNullStringAs=Null, PerWorldBindings] readonly attribute DOMString localName;
 
+    [RaisesException] boolean matches(DOMString selectors);
+
     // Common extensions
 
     [PerWorldBindings] readonly attribute long offsetLeft;
@@ -104,7 +106,7 @@
     [RaisesException] NodeList querySelectorAll(DOMString selectors);
 
     // WebKit extension
-    [RaisesException, MeasureAs=ElementPrefixedMatchesSelector] boolean webkitMatchesSelector([Default=Undefined] optional DOMString selectors);
+    [RaisesException, ImplementedAs=matches, MeasureAs=ElementPrefixedMatchesSelector] boolean webkitMatchesSelector(DOMString selectors);
 
     // Shadow DOM API
     [RuntimeEnabled=ShadowDOM, RaisesException] ShadowRoot createShadowRoot();