[SVG2] Add getters and setters to SVG*List interfaces.

Source/core/svg/SVGPathSegList.idl

 /*
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  * Copyright (C) 2006 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 11 matching lines @@
  * 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.
  */
 
 [
     StrictTypeChecking,
     SetWrapperReferenceTo(SVGElement contextElement),
     ImplementedAs=SVGPathSegListTearOff
 ] interface SVGPathSegList {
-    readonly attribute unsigned long numberOfItems;
+    readonly attribute unsigned long length;
+    [ImplementedAs=length] readonly attribute unsigned long numberOfItems;
 
     [RaisesException] void clear();
     [RaisesException] SVGPathSeg initialize(SVGPathSeg newItem);
-    [RaisesException] SVGPathSeg getItem(unsigned long index);
+    [RaisesException] getter SVGPathSeg getItem(unsigned long index);
+    [RaisesException] setter SVGPathSeg (unsigned long index, SVGPathSeg value);
     [RaisesException] SVGPathSeg insertItemBefore(SVGPathSeg newItem, unsigned long index);
     [RaisesException] SVGPathSeg replaceItem(SVGPathSeg newItem, unsigned long index);
     [RaisesException] SVGPathSeg removeItem(unsigned long index);
     [RaisesException] SVGPathSeg appendItem(SVGPathSeg newItem);
 };