Reduce LayoutSVGResource*Gradient building dependency on GradientData

third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceRadialGradient.cpp

 /*
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2012 Adobe Systems Incorporated. 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.
  *
@@ skipping 43 matching lines @@
 float LayoutSVGResourceRadialGradient::radius(const RadialGradientAttributes& attributes) const
 {
     return SVGLengthContext::resolveLength(element(), attributes.gradientUnits(), *attributes.r());
 }
 
 float LayoutSVGResourceRadialGradient::focalRadius(const RadialGradientAttributes& attributes) const
 {
     return SVGLengthContext::resolveLength(element(), attributes.gradientUnits(), *attributes.fr());
 }
 
-void LayoutSVGResourceRadialGradient::buildGradient(GradientData* gradientData) const
+PassRefPtr<Gradient> LayoutSVGResourceRadialGradient::buildGradient() const
 {
     const RadialGradientAttributes& attributes = this->attributes();
-    gradientData->gradient = Gradient::create(this->focalPoint(attributes),
-        this->focalRadius(attributes),
-        this->centerPoint(attributes),
-        this->radius(attributes));
-
-    gradientData->gradient->setSpreadMethod(platformSpreadMethodFromSVGType(attributes.spreadMethod()));
-
-    addStops(gradientData, attributes.stops());
+    RefPtr<Gradient> gradient = Gradient::create(
+        focalPoint(attributes), focalRadius(attributes),
+        centerPoint(attributes), radius(attributes));
+    gradient->setSpreadMethod(platformSpreadMethodFromSVGType(attributes.spreadMethod()));
+    addStops(*gradient, attributes.stops());
+    return gradient.release();
 }
 
 } // namespace blink