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

Source/core/svg/SVGCursorElement.h

Index: Source/core/svg/SVGCursorElement.h
diff --git a/Source/core/svg/SVGCursorElement.h b/Source/core/svg/SVGCursorElement.h
index f0b17c06369c527cc280b0022bfe926b66ee725c..7d4ff9e841f3146fcf16a8bef346ad3415328e9e 100644
--- a/Source/core/svg/SVGCursorElement.h
+++ b/Source/core/svg/SVGCursorElement.h
@@ -42,6 +42,9 @@ public:
     void removeClient(SVGElement*);
     void removeReferencedElement(SVGElement*);
 
+    SVGAnimatedLength* x() const { return m_x.get(); }
+    SVGAnimatedLength* y() const { return m_y.get(); }
+
 private:
     explicit SVGCursorElement(Document&);
 
@@ -53,9 +56,9 @@ private:
 
     virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE { return false; }
 
+    RefPtr<SVGAnimatedLength> m_x;
+    RefPtr<SVGAnimatedLength> m_y;
     BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGCursorElement)
-        DECLARE_ANIMATED_LENGTH(X, x)
-        DECLARE_ANIMATED_LENGTH(Y, y)
         DECLARE_ANIMATED_STRING(Href, href)
     END_DECLARE_ANIMATED_PROPERTIES