Add Gradient::addColorStops method

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

 /*
  * 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 38 matching lines @@
   return SVGLengthContext::resolvePoint(element(), attributes.gradientUnits(),
                                         *attributes.x2(), *attributes.y2());
 }
 
 PassRefPtr<Gradient> LayoutSVGResourceLinearGradient::buildGradient() const {
   const LinearGradientAttributes& attributes = this->attributes();
   RefPtr<Gradient> gradient =
       Gradient::create(startPoint(attributes), endPoint(attributes));
   gradient->setSpreadMethod(
       platformSpreadMethodFromSVGType(attributes.spreadMethod()));
-  addStops(*gradient, attributes.stops());
+  gradient->addColorStops(attributes.stops());
   return gradient.release();
 }
 
 }  // namespace blink