Make NodeIterator.detach() a no-op

Source/core/frame/UseCounter.cpp

Index: Source/core/frame/UseCounter.cpp
diff --git a/Source/core/frame/UseCounter.cpp b/Source/core/frame/UseCounter.cpp
index ead539dbcf924b3aacf8b8c3dbede2b9d6d4fd70..aef010f88308bd2631905d25ac8dc90f2e6b7f2c 100644
--- a/Source/core/frame/UseCounter.cpp
+++ b/Source/core/frame/UseCounter.cpp
@@ -712,6 +712,9 @@ String UseCounter::deprecationMessage(Feature feature)
     case ElementSetAttributeNodeNS:
         return "'Element.setAttributeNodeNS' is deprecated and has been removed from DOM4 (http://w3.org/tr/dom).";
 
+    case NodeIteratorDetach:
+        return "'NodeIterator.detach' is now a no-op, as per DOM (http://dom.spec.whatwg.org/#dom-nodeiterator-detach).";
+
     // Features that aren't deprecated don't have a deprecation message.
     default:
         return String();