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

Source/core/svg/SVGMarkerElement.h

Index: Source/core/svg/SVGMarkerElement.h
diff --git a/Source/core/svg/SVGMarkerElement.h b/Source/core/svg/SVGMarkerElement.h
index 80c96d251932918e81d71da32fb32528f14fdcf1..8d2144185b26aaf40002b113edfa1b75a6125b5d 100644
--- a/Source/core/svg/SVGMarkerElement.h
+++ b/Source/core/svg/SVGMarkerElement.h
@@ -118,6 +118,11 @@ public:
 
     static const SVGPropertyInfo* orientTypePropertyInfo();
 
+    SVGAnimatedLength* refX() const { return m_refX.get(); }
+    SVGAnimatedLength* refY() const { return m_refY.get(); }
+    SVGAnimatedLength* markerWidth() const { return m_markerWidth.get(); }
+    SVGAnimatedLength* markerHeight() const { return m_markerHeight.get(); }
+
     // Custom 'orientType' property.
     static void synchronizeOrientType(SVGElement* contextElement);
     static PassRefPtr<SVGAnimatedProperty> lookupOrCreateOrientTypeWrapper(SVGElement* contextElement);
@@ -146,13 +151,12 @@ private:
     static const AtomicString& orientTypeIdentifier();
     static const AtomicString& orientAngleIdentifier();
 
+    RefPtr<SVGAnimatedLength> m_refX;
+    RefPtr<SVGAnimatedLength> m_refY;
+    RefPtr<SVGAnimatedLength> m_markerWidth;
+    RefPtr<SVGAnimatedLength> m_markerHeight;
     mutable SVGSynchronizableAnimatedProperty<SVGMarkerOrientType> m_orientType;
-
     BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGMarkerElement)
-        DECLARE_ANIMATED_LENGTH(RefX, refX)
-        DECLARE_ANIMATED_LENGTH(RefY, refY)
-        DECLARE_ANIMATED_LENGTH(MarkerWidth, markerWidth)
-        DECLARE_ANIMATED_LENGTH(MarkerHeight, markerHeight)
         DECLARE_ANIMATED_ENUMERATION(MarkerUnits, markerUnits, SVGMarkerUnitsType)
         DECLARE_ANIMATED_ANGLE(OrientAngle, orientAngle)
         DECLARE_ANIMATED_RECT(ViewBox, viewBox)