Move supplemental transform to rare data

Source/core/svg/SVGGraphicsElement.h

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2014 Google, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 34 matching lines @@
     PassRefPtr<SVGMatrixTearOff> getCTMFromJavascript();
     PassRefPtr<SVGMatrixTearOff> getScreenCTMFromJavascript();
 
     PassRefPtr<SVGMatrixTearOff> getTransformToElement(SVGElement*, ExceptionState&);
 
     SVGElement* nearestViewportElement() const;
     SVGElement* farthestViewportElement() const;
 
     virtual AffineTransform localCoordinateSpaceTransform(SVGElement::CTMScope) const override { return animatedLocalTransform(); }
     virtual AffineTransform animatedLocalTransform() const;
-    virtual AffineTransform* supplementalTransform() override;
+    virtual AffineTransform* animateMotionTransform() override;
 
     virtual FloatRect getBBox();
     PassRefPtr<SVGRectTearOff> getBBoxFromJavascript();
 
     // "base class" methods for all the elements which render as paths
     virtual void toClipPath(Path&);
     virtual RenderObject* createRenderer(RenderStyle*) override;
 
     virtual bool isValid() const override final { return SVGTests::isValid(); }
 
     SVGAnimatedTransformList* transform() { return m_transform.get(); }
     const SVGAnimatedTransformList* transform() const { return m_transform.get(); }
 
     AffineTransform computeCTM(SVGElement::CTMScope mode, SVGGraphicsElement::StyleUpdateStrategy,
         const SVGGraphicsElement* ancestor = 0) const;
 
 protected:
     SVGGraphicsElement(const QualifiedName&, Document&, ConstructionType = CreateSVGElement);
 
     virtual bool supportsFocus() const override { return Element::supportsFocus() || hasFocusEventListeners(); }
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
     virtual void svgAttributeChanged(const QualifiedName&) override;
 
     RefPtr<SVGAnimatedTransformList> m_transform;
 
 private:
     virtual bool isSVGGraphicsElement() const override final { return true; }
-
-    // Used by <animateMotion>
-    OwnPtr<AffineTransform> m_supplementalTransform;
 };
 
 inline bool isSVGGraphicsElement(const SVGElement& element)
 {
     return element.isSVGGraphicsElement();
 }
 
 DEFINE_SVGELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGGraphicsElement);
 
 } // namespace blink
 
 #endif // SVGGraphicsElement_h