Add a native subtype of function that uses the native C++ class hierarchy to check if an element

Source/bindings/dart/DartDOMData.h

Index: Source/bindings/dart/DartDOMData.h
===================================================================
--- Source/bindings/dart/DartDOMData.h	(revision 1437)
+++ Source/bindings/dart/DartDOMData.h	(working copy)
@@ -32,7 +32,9 @@
 #define DartDOMData_h
 
 #include "DartWebkitClassIds.h"
+
 #include "bindings/dart/DartCustomElementBinding.h"
+#include "bindings/dart/DartLibraryIds.h"
 #include "bindings/dart/DartStringCache.h"
 
 #include "wtf/HashMap.h"
@@ -47,19 +49,6 @@
 
 namespace WebCore {
 
-enum {
-    DartCoreLibraryId = 0,
-    DartTypedDataLibraryId,
-    DartHtmlLibraryId,
-    DartIndexedDbLibraryId,
-    DartSvgLibraryId,
-    DartWebAudioLibraryId,
-    DartWebGlLibraryId,
-    DartWebSqlLibraryId,
-
-    NumDartLibraryIds,
-};
-
 class ActiveDOMObject;
 class CustomElementDefinition;
 class DOMWindow;