[binding] Check own property on named property accessor

Source/bindings/v8/custom/V8StyleSheetListCustom.cpp

 /*
  * Copyright (C) 2007-2009 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 22 matching lines @@
 
 #include "V8StyleSheet.h"
 #include "bindings/v8/V8Binding.h"
 #include "core/css/StyleSheetList.h"
 #include "core/html/HTMLStyleElement.h"
 
 namespace WebCore {
 
 v8::Handle<v8::Value> V8StyleSheetList::namedPropertyGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
 {
+    if (!info.Holder()->GetRealNamedPropertyInPrototypeChain(name).IsEmpty())
+        return v8Undefined();
+    if (info.Holder()->HasRealNamedCallbackProperty(name))
+        return v8Undefined();
     if (info.Holder()->HasRealNamedProperty(name))
         return v8Undefined();
 
     // Search style sheet.
     StyleSheetList* imp = V8StyleSheetList::toNative(info.Holder());
     HTMLStyleElement* item = imp->getNamedItem(toWebCoreString(name));
     if (!item)
         return v8Undefined();
 
     return toV8Fast(item->sheet(), info, imp);
 }
 
 } // namespace WebCore