Implement Custom Elements' attributeChangedCallback.

Source/core/dom/NamedNodeMap.idl

Index: Source/core/dom/NamedNodeMap.idl
diff --git a/Source/core/dom/NamedNodeMap.idl b/Source/core/dom/NamedNodeMap.idl
index 6a8e4e0fd22d52daa8f1bde1f997ec97a9ad17d7..d0bd9bdb86b220bfc131e8e971cf16152795740b 100644
--- a/Source/core/dom/NamedNodeMap.idl
+++ b/Source/core/dom/NamedNodeMap.idl
@@ -25,9 +25,9 @@
     Node getNamedItem([Default=Undefined] optional DOMString name);
     [NotEnumerable, ImplementedAs=getNamedItem] getter Node ([Default=Undefined] optional DOMString name);
 
-    [RaisesException] Node setNamedItem([Default=Undefined] optional Node node);
+    [RaisesException, DeliverCustomElementCallbacks] Node setNamedItem([Default=Undefined] optional Node node);
 
-    [RaisesException] Node removeNamedItem([Default=Undefined] optional DOMString name);
+    [RaisesException, DeliverCustomElementCallbacks] Node removeNamedItem([Default=Undefined] optional DOMString name);
 
     getter Node item([Default=Undefined] optional unsigned long index);
     
@@ -40,9 +40,9 @@
     /*[RaisesException]*/ Node getNamedItemNS([TreatNullAs=NullString,Default=Undefined] optional DOMString namespaceURI, 
                                               [Default=Undefined] optional DOMString localName);
 
-    [RaisesException] Node setNamedItemNS([Default=Undefined] optional Node node);
+    [RaisesException, DeliverCustomElementCallbacks] Node setNamedItemNS([Default=Undefined] optional Node node);
 
-     [RaisesException] Node removeNamedItemNS([TreatNullAs=NullString,Default=Undefined] optional DOMString namespaceURI, 
+    [RaisesException, DeliverCustomElementCallbacks] Node removeNamedItemNS([TreatNullAs=NullString,Default=Undefined] optional DOMString namespaceURI,
                                           [Default=Undefined] optional DOMString localName);
 
 };