Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGLengthTearOff.h

Index: Source/core/svg/SVGLengthTearOff.h
diff --git a/Source/core/svg/SVGLengthTearOff.h b/Source/core/svg/SVGLengthTearOff.h
index 36ebb05103b5d687f1ea37b192a658881e292858..55feeec41df7853d6a225fb7c3bcd607a33dd1e5 100644
--- a/Source/core/svg/SVGLengthTearOff.h
+++ b/Source/core/svg/SVGLengthTearOff.h
@@ -55,9 +55,9 @@ public:
         SVG_LENGTHTYPE_PC = LengthTypePC
     };
 
-    static PassRefPtr<SVGLengthTearOff> create(PassRefPtr<SVGLength> target, SVGElement* contextElement, PropertyIsAnimValType propertyIsAnimVal, const QualifiedName& attributeName = QualifiedName::null())
+    static PassRefPtrWillBeRawPtr<SVGLengthTearOff> create(PassRefPtrWillBeRawPtr<SVGLength> target, SVGElement* contextElement, PropertyIsAnimValType propertyIsAnimVal, const QualifiedName& attributeName = QualifiedName::null())
     {
-        return adoptRef(new SVGLengthTearOff(target, contextElement, propertyIsAnimVal, attributeName));
+        return adoptRefWillBeNoop(new SVGLengthTearOff(target, contextElement, propertyIsAnimVal, attributeName));
     }
 
     SVGLengthType unitType();
@@ -72,7 +72,7 @@ public:
     void convertToSpecifiedUnits(unsigned short unitType, ExceptionState&);
 
 private:
-    SVGLengthTearOff(PassRefPtr<SVGLength>, SVGElement* contextElement, PropertyIsAnimValType, const QualifiedName& attributeName = QualifiedName::null());
+    SVGLengthTearOff(PassRefPtrWillBeRawPtr<SVGLength>, SVGElement* contextElement, PropertyIsAnimValType, const QualifiedName& attributeName = QualifiedName::null());
 };
 
 } // namespace blink