Update WebKit IDLs after chrome roll.

dom/PropertyNodeList.idl

 /*
  * Copyright (c) 2012 Motorola Mobility, 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 copyright notice,
@@ skipping 12 matching lines @@
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 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.
  */
 
 [
     Conditional=MICRODATA,
-    IndexedGetter,
-    JSGenerateToJSObject
+    IndexedGetter
 ] interface PropertyNodeList : NodeList {
 
     sequence<MicroDataItemValue> getValues();
     Node item(in unsigned long index);
 
     readonly attribute unsigned long length;
 };