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

Source/core/svg/SVGPathSegList.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 144 matching lines @@
     invalidateList();
     if (!m_byteStream)
         m_byteStream = SVGPathByteStream::create();
     if (!buildSVGPathByteStreamFromString(string, m_byteStream.get(), UnalteredParsing))
         exceptionState.throwDOMException(SyntaxError, "Problem parsing path \"" + string + "\"");
 }
 
 void SVGPathSegList::add(PassRefPtr<NewSVGPropertyBase> other, SVGElement*)
 {
     RefPtr<SVGPathSegList> otherList = toSVGPathSegList(other);
-    if (numberOfItems() != otherList->numberOfItems())
+    if (length() != otherList->length())
         return;
 
     byteStream(); // create |m_byteStream| if not exist.
     addToSVGPathByteStream(m_byteStream.get(), otherList->byteStream());
     invalidateList();
 }
 
 void SVGPathSegList::calculateAnimatedValue(SVGAnimationElement* animationElement, float percentage, unsigned repeatCount, PassRefPtr<NewSVGPropertyBase> fromValue, PassRefPtr<NewSVGPropertyBase> toValue, PassRefPtr<NewSVGPropertyBase> toAtEndOfDurationValue, SVGElement*)
 {
     invalidateList();
@@ skipping 54 matching lines @@
     }
 }
 
 float SVGPathSegList::calculateDistance(PassRefPtr<NewSVGPropertyBase> to, SVGElement*)
 {
     // FIXME: Support paced animations.
     return -1;
 }
 
 }