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

Source/core/svg/SVGLengthContext.h

Index: Source/core/svg/SVGLengthContext.h
diff --git a/Source/core/svg/SVGLengthContext.h b/Source/core/svg/SVGLengthContext.h
index 64c237040c181db4390d2d827f9264eda7c66c69..5ad5c6a74f11716eea59ac08768b7280bcde02da 100644
--- a/Source/core/svg/SVGLengthContext.h
+++ b/Source/core/svg/SVGLengthContext.h
@@ -56,12 +56,12 @@ public:
     template<typename T>
     static FloatRect resolveRectangle(const T* context, SVGUnitTypes::SVGUnitType type, const FloatRect& viewport)
     {
-        return SVGLengthContext::resolveRectangle(context, type, viewport, context->xCurrentValue(), context->yCurrentValue(), context->widthCurrentValue(), context->heightCurrentValue());
+        return SVGLengthContext::resolveRectangle(context, type, viewport, context->x()->currentValue(), context->y()->currentValue(), context->width()->currentValue(), context->height()->currentValue());
     }
 
-    static FloatRect resolveRectangle(const SVGElement*, SVGUnitTypes::SVGUnitType, const FloatRect& viewport, const SVGLength& x, const SVGLength& y, const SVGLength& width, const SVGLength& height);
-    static FloatPoint resolvePoint(const SVGElement*, SVGUnitTypes::SVGUnitType, const SVGLength& x, const SVGLength& y);
-    static float resolveLength(const SVGElement*, SVGUnitTypes::SVGUnitType, const SVGLength&);
+    static FloatRect resolveRectangle(const SVGElement*, SVGUnitTypes::SVGUnitType, const FloatRect& viewport, PassRefPtr<SVGLength> x, PassRefPtr<SVGLength> y, PassRefPtr<SVGLength> width, PassRefPtr<SVGLength> height);
+    static FloatPoint resolvePoint(const SVGElement*, SVGUnitTypes::SVGUnitType, PassRefPtr<SVGLength> x, PassRefPtr<SVGLength> y);
+    static float resolveLength(const SVGElement*, SVGUnitTypes::SVGUnitType, PassRefPtr<SVGLength>);
 
     float convertValueToUserUnits(float, SVGLengthMode, SVGLengthType fromUnit, ExceptionState&) const;
     float convertValueFromUserUnits(float, SVGLengthMode, SVGLengthType toUnit, ExceptionState&) const;