[SVG] SVGAnimatedString{,List} migration to new SVG property impl.

Source/core/svg/SVGString.cpp

 /*
  * Copyright (C) Research In Motion Limited 2011. 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
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  * along with this library; see the file COPYING.LIB.  If not, write to
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-#ifndef SVGPathData_h
-#define SVGPathData_h
+#include "config.h"
+#include "core/svg/SVGString.h"
+
+#include "core/svg/SVGAnimateElement.h"
 
 namespace WebCore {
 
-class SVGElement;
-class Path;
+void SVGString::add(PassRefPtr<NewSVGPropertyBase>, SVGElement*)
+{
+    ASSERT_NOT_REACHED();
+}
 
-void updatePathFromGraphicsElement(SVGElement*, Path&);
+void SVGString::calculateAnimatedValue(SVGAnimationElement* animationElement, float percentage, unsigned repeatCount, PassRefPtr<NewSVGPropertyBase> from, PassRefPtr<NewSVGPropertyBase> to, PassRefPtr<NewSVGPropertyBase>, SVGElement*)
+{
+    ASSERT(animationElement);
 
-};
+    String fromString = toSVGString(from)->m_value;
+    String toString = toSVGString(to)->m_value;
 
-#endif // SVGPathData_h
+    animationElement->animateDiscreteType<String>(percentage, fromString, toString, m_value);
+}
+
+float SVGString::calculateDistance(PassRefPtr<NewSVGPropertyBase>, SVGElement*)
+{
+    // No paced animations for strings.

[haraken, 2014/01/29 05:18:00]

It's confusing to me which elements can animate and which elements cannot
animate. Probably we might want to implement 'virtual bool isAnimated()' in
NewSVGPropertyBase and override the isAnimated() in each subclass.

[kouhei (in TOK), 2014/01/30 08:18:56]

"Paced" animations are not supported, but normal discrete animations are
supported for SVGString.

[haraken, 2014/01/30 11:00:09]

Makes sense. Then we might want to have isPacedAnimationSupported() and
isDiscreteAnimationSupported(). Then you could use these methods to add ASSERTs.
(You don't need to do that in this CL though.)

+    return -1;
+}
+
+}