Make RenderObject::style() return a const object

Source/core/svg/SVGGraphicsElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 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 114 matching lines @@
     return SVGMatrixTearOff::create(getCTM());
 }
 
 PassRefPtrWillBeRawPtr<SVGMatrixTearOff> SVGGraphicsElement::getScreenCTMFromJavascript()
 {
     return SVGMatrixTearOff::create(getScreenCTM());
 }
 
 bool SVGGraphicsElement::hasAnimatedLocalTransform() const
 {
-    LayoutStyle* style = renderer() ? renderer()->style() : 0;
+    const LayoutStyle* style = renderer() ? renderer()->style() : nullptr;
 
     // Each of these is used in SVGGraphicsElement::calculateAnimatedLocalTransform to create an animated local transform.
     return (style && style->hasTransform()) || !m_transform->currentValue()->isEmpty() || hasSVGRareData();
 }
 
 AffineTransform SVGGraphicsElement::calculateAnimatedLocalTransform() const
 {
     AffineTransform matrix;
-    LayoutStyle* style = renderer() ? renderer()->style() : 0;
+    const LayoutStyle* style = renderer() ? renderer()->style() : nullptr;
 
     // If CSS property was set, use that, otherwise fallback to attribute (if set).
     if (style && style->hasTransform()) {
         TransformationMatrix transform;
         float zoom = style->effectiveZoom();
 
         // SVGTextElements need special handling for the text positioning code.
         if (isSVGTextElement(this)) {
             // Do not take into account SVG's zoom rules, transform-origin, or percentage values.
             style->applyTransform(transform, LayoutSize(0, 0), LayoutStyle::ExcludeTransformOrigin);
@@ skipping 118 matching lines @@
     return new LayoutSVGPath(this);
 }
 
 void SVGGraphicsElement::toClipPath(Path& path)
 {
     updatePathFromGraphicsElement(this, path);
     path.transform(calculateAnimatedLocalTransform());
 }
 
 }