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

Source/core/svg/SVGEllipseElement.h

Index: Source/core/svg/SVGEllipseElement.h
diff --git a/Source/core/svg/SVGEllipseElement.h b/Source/core/svg/SVGEllipseElement.h
index 1dc8cf9a73161620b168dc6341726af0826a1553..d153d422eccf9feb07d2d97e53fced56726933c4 100644
--- a/Source/core/svg/SVGEllipseElement.h
+++ b/Source/core/svg/SVGEllipseElement.h
@@ -32,6 +32,11 @@ class SVGEllipseElement FINAL : public SVGGeometryElement {
 public:
     static PassRefPtr<SVGEllipseElement> create(Document&);
 
+    SVGAnimatedLength* cx() const { return m_cx.get(); }
+    SVGAnimatedLength* cy() const { return m_cy.get(); }
+    SVGAnimatedLength* rx() const { return m_rx.get(); }
+    SVGAnimatedLength* ry() const { return m_ry.get(); }
+
 private:
     explicit SVGEllipseElement(Document&);
 
@@ -46,11 +51,11 @@ private:
 
     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
 
+    RefPtr<SVGAnimatedLength> m_cx;
+    RefPtr<SVGAnimatedLength> m_cy;
+    RefPtr<SVGAnimatedLength> m_rx;
+    RefPtr<SVGAnimatedLength> m_ry;
     BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGEllipseElement)
-        DECLARE_ANIMATED_LENGTH(Cx, cx)
-        DECLARE_ANIMATED_LENGTH(Cy, cy)
-        DECLARE_ANIMATED_LENGTH(Rx, rx)
-        DECLARE_ANIMATED_LENGTH(Ry, ry)
     END_DECLARE_ANIMATED_PROPERTIES
 };