Oilpan: move SVG property hierarchy to the heap.

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 3846261dc4a7a07ee145e152b219fc388ed0790a..8f3071fc418ab956635cebf0344dd2cd3fe3043e 100644
--- a/Source/core/svg/SVGLengthContext.h
+++ b/Source/core/svg/SVGLengthContext.h
@@ -60,9 +60,9 @@ public:
         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, 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>);
+    static FloatRect resolveRectangle(const SVGElement*, SVGUnitTypes::SVGUnitType, const FloatRect& viewport, PassRefPtrWillBeRawPtr<SVGLength> x, PassRefPtrWillBeRawPtr<SVGLength> y, PassRefPtrWillBeRawPtr<SVGLength> width, PassRefPtrWillBeRawPtr<SVGLength> height);
+    static FloatPoint resolvePoint(const SVGElement*, SVGUnitTypes::SVGUnitType, PassRefPtrWillBeRawPtr<SVGLength> x, PassRefPtrWillBeRawPtr<SVGLength> y);
+    static float resolveLength(const SVGElement*, SVGUnitTypes::SVGUnitType, PassRefPtrWillBeRawPtr<SVGLength>);
 
     float convertValueToUserUnits(float, SVGLengthMode, SVGLengthType fromUnit, ExceptionState&) const;
     float convertValueFromUserUnits(float, SVGLengthMode, SVGLengthType toUnit, ExceptionState&) const;