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 eb55c2e7090ca9f7caa8ef0079ec9c395c95f56b..314dbe0a3f485634695f43c035d53c7da7cce67e 100644
--- a/Source/core/dom/Element.idl
+++ b/Source/core/dom/Element.idl
@@ -57,6 +57,8 @@
     [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;
@@ -98,7 +100,7 @@
     [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, Reflect, TreatNullAs=NullString, PerWorldBindings] attribute DOMString pseudo;