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

Source/bindings/dart/DartDOMData.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef DartDOMData_h
 #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"
 #include "wtf/HashSet.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Threading.h"
 #include "wtf/ThreadingPrimitives.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
 #include <dart_api.h>
 
 namespace WebCore {
 
-enum {
-    DartCoreLibraryId = 0,
-    DartTypedDataLibraryId,
-    DartHtmlLibraryId,
-    DartIndexedDbLibraryId,
-    DartSvgLibraryId,
-    DartWebAudioLibraryId,
-    DartWebGlLibraryId,
-    DartWebSqlLibraryId,
-
-    NumDartLibraryIds,
-};
-
 class ActiveDOMObject;
 class CustomElementDefinition;
 class DOMWindow;
 class DartApplicationLoader;
 class DartAsyncLoader;
 class DartEventListener;
 class DartIsolateDestructionObserver;
 class DartWeakCallback;
 class EventTarget;
 class MessagePort;
@@ skipping 151 matching lines @@
     DartWeakCallbacks m_weakCallbacks;
     DartIsolateDestructionObservers m_isolateDestructionObservers;
     DartCustomElementBindingMap m_customElementBindings;
     ClassTable m_classHandleCache;
     LibraryTable m_libraryHandleCache;
 };
 
 }
 
 #endif // DartDOMData_h