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

Source/core/svg/SVGLengthContext.cpp

Index: Source/core/svg/SVGLengthContext.cpp
diff --git a/Source/core/svg/SVGLengthContext.cpp b/Source/core/svg/SVGLengthContext.cpp
index 7fed6c20b7ad3dc05f658e311614e6d8e4ac4d66..0f4b7bee928b13745646bb2f76681146a8d0e94c 100644
--- a/Source/core/svg/SVGLengthContext.cpp
+++ b/Source/core/svg/SVGLengthContext.cpp
@@ -47,43 +47,54 @@ SVGLengthContext::SVGLengthContext(const SVGElement* context, const FloatRect& v
 {
 }
 
-FloatRect SVGLengthContext::resolveRectangle(const SVGElement* context, SVGUnitTypes::SVGUnitType type, const FloatRect& viewport, const SVGLength& x, const SVGLength& y, const SVGLength& width, const SVGLength& height)
+FloatRect SVGLengthContext::resolveRectangle(const SVGElement* context, SVGUnitTypes::SVGUnitType type, const FloatRect& viewport, PassRefPtr<SVGLength> passX, PassRefPtr<SVGLength> passY, PassRefPtr<SVGLength> passWidth, PassRefPtr<SVGLength> passHeight)
 {
+    RefPtr<SVGLength> x = passX;
+    RefPtr<SVGLength> y = passY;
+    RefPtr<SVGLength> width = passWidth;
+    RefPtr<SVGLength> height = passHeight;
+
     ASSERT(type != SVGUnitTypes::SVG_UNIT_TYPE_UNKNOWN);
     if (type == SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE) {
         SVGLengthContext lengthContext(context);
-        return FloatRect(x.value(lengthContext), y.value(lengthContext), width.value(lengthContext), height.value(lengthContext));
+        return FloatRect(x->value(lengthContext), y->value(lengthContext), width->value(lengthContext), height->value(lengthContext));
     }
 
     SVGLengthContext lengthContext(context, viewport);
-    return FloatRect(x.value(lengthContext) + viewport.x(),
-                     y.value(lengthContext) + viewport.y(),
-                     width.value(lengthContext),
-                     height.value(lengthContext));
+    return FloatRect(
+        x->value(lengthContext) + viewport.x(),
+        y->value(lengthContext) + viewport.y(),
+        width->value(lengthContext),
+        height->value(lengthContext));
 }
 
-FloatPoint SVGLengthContext::resolvePoint(const SVGElement* context, SVGUnitTypes::SVGUnitType type, const SVGLength& x, const SVGLength& y)
+FloatPoint SVGLengthContext::resolvePoint(const SVGElement* context, SVGUnitTypes::SVGUnitType type, PassRefPtr<SVGLength> passX, PassRefPtr<SVGLength> passY)
 {
+    RefPtr<SVGLength> x = passX;
+    RefPtr<SVGLength> y = passY;
+
     ASSERT(type != SVGUnitTypes::SVG_UNIT_TYPE_UNKNOWN);
     if (type == SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE) {
         SVGLengthContext lengthContext(context);
-        return FloatPoint(x.value(lengthContext), y.value(lengthContext));
+        return FloatPoint(x->value(lengthContext), y->value(lengthContext));
     }
 
     // FIXME: valueAsPercentage() won't be correct for eg. cm units. They need to be resolved in user space and then be considered in objectBoundingBox space.
-    return FloatPoint(x.valueAsPercentage(), y.valueAsPercentage());
+    return FloatPoint(x->valueAsPercentage(), y->valueAsPercentage());
 }
 
-float SVGLengthContext::resolveLength(const SVGElement* context, SVGUnitTypes::SVGUnitType type, const SVGLength& x)
+float SVGLengthContext::resolveLength(const SVGElement* context, SVGUnitTypes::SVGUnitType type, PassRefPtr<SVGLength> passX)
 {
+    RefPtr<SVGLength> x = passX;
+
     ASSERT(type != SVGUnitTypes::SVG_UNIT_TYPE_UNKNOWN);
     if (type == SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE) {
         SVGLengthContext lengthContext(context);
-        return x.value(lengthContext);
+        return x->value(lengthContext);
     }
 
     // FIXME: valueAsPercentage() won't be correct for eg. cm units. They need to be resolved in user space and then be considered in objectBoundingBox space.
-    return x.valueAsPercentage();
+    return x->valueAsPercentage();
 }
 
 float SVGLengthContext::convertValueToUserUnits(float value, SVGLengthMode mode, SVGLengthType fromUnit, ExceptionState& exceptionState) const