Reduce LayoutSVGResource*Gradient building dependency on GradientData

third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceLinearGradient.h

 /*
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 21 matching lines @@
 public:
     explicit LayoutSVGResourceLinearGradient(SVGLinearGradientElement*);
     ~LayoutSVGResourceLinearGradient() override;
 
     const char* name() const override { return "LayoutSVGResourceLinearGradient"; }
 
     static const LayoutSVGResourceType s_resourceType = LinearGradientResourceType;
     LayoutSVGResourceType resourceType() const override { return s_resourceType; }
 
     SVGUnitTypes::SVGUnitType gradientUnits() const override { return attributes().gradientUnits(); }
-    void calculateGradientTransform(AffineTransform& transform) override { transform = attributes().gradientTransform(); }
+    AffineTransform calculateGradientTransform() const override { return attributes().gradientTransform(); }
     bool collectGradientAttributes(SVGGradientElement*) override;
-    void buildGradient(GradientData*) const override;
+    PassRefPtr<Gradient> buildGradient() const override;
 
     FloatPoint startPoint(const LinearGradientAttributes&) const;
     FloatPoint endPoint(const LinearGradientAttributes&) const;
 
 private:
     Persistent<LinearGradientAttributesWrapper> m_attributesWrapper;
 
     LinearGradientAttributes& mutableAttributes() { return m_attributesWrapper->attributes(); }
     const LinearGradientAttributes& attributes() const { return m_attributesWrapper->attributes(); }
 };
 
 } // namespace blink
 
 #endif // LayoutSVGResourceLinearGradient_h