Reduce LayoutSVGResource*Gradient building dependency on GradientData

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

Index: third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceLinearGradient.cpp
diff --git a/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceLinearGradient.cpp b/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceLinearGradient.cpp
index 32c457d35fcb7d8b7606967353a43246f0b1a9c8..a64ca80e4ee3c4ed4693239d0a3568cc33bc0f41 100644
--- a/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceLinearGradient.cpp
+++ b/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceLinearGradient.cpp
@@ -50,12 +50,13 @@ FloatPoint LayoutSVGResourceLinearGradient::endPoint(const LinearGradientAttribu
     return SVGLengthContext::resolvePoint(element(), attributes.gradientUnits(), *attributes.x2(), *attributes.y2());
 }
 
-void LayoutSVGResourceLinearGradient::buildGradient(GradientData* gradientData) const
+PassRefPtr<Gradient> LayoutSVGResourceLinearGradient::buildGradient() const
 {
     const LinearGradientAttributes& attributes = this->attributes();
-    gradientData->gradient = Gradient::create(startPoint(attributes), endPoint(attributes));
-    gradientData->gradient->setSpreadMethod(platformSpreadMethodFromSVGType(attributes.spreadMethod()));
-    addStops(gradientData, attributes.stops());
+    RefPtr<Gradient> gradient = Gradient::create(startPoint(attributes), endPoint(attributes));
+    gradient->setSpreadMethod(platformSpreadMethodFromSVGType(attributes.spreadMethod()));
+    addStops(*gradient, attributes.stops());
+    return gradient.release();
 }
 
 } // namespace blink