Make RenderObject::style() return a const object

Source/core/svg/SVGGraphicsElement.cpp

Index: Source/core/svg/SVGGraphicsElement.cpp
diff --git a/Source/core/svg/SVGGraphicsElement.cpp b/Source/core/svg/SVGGraphicsElement.cpp
index 23cbbff77ff647ddb56e98ded9735d25855f9f8f..9a6a75d0e33c0f8ad2c86ea042bf880e0d30fd0f 100644
--- a/Source/core/svg/SVGGraphicsElement.cpp
+++ b/Source/core/svg/SVGGraphicsElement.cpp
@@ -132,7 +132,7 @@ PassRefPtrWillBeRawPtr<SVGMatrixTearOff> SVGGraphicsElement::getScreenCTMFromJav
 
 bool SVGGraphicsElement::hasAnimatedLocalTransform() const
 {
-    RenderStyle* style = renderer() ? renderer()->style() : 0;
+    const RenderStyle* style = renderer() ? renderer()->style() : 0;
 
     // Each of these is used in SVGGraphicsElement::calculateAnimatedLocalTransform to create an animated local transform.
     return (style && style->hasTransform()) || !m_transform->currentValue()->isEmpty() || hasSVGRareData();
@@ -141,7 +141,7 @@ bool SVGGraphicsElement::hasAnimatedLocalTransform() const
 AffineTransform SVGGraphicsElement::calculateAnimatedLocalTransform() const
 {
     AffineTransform matrix;
-    RenderStyle* style = renderer() ? renderer()->style() : 0;
+    const RenderStyle* style = renderer() ? renderer()->style() : 0;
 
     // If CSS property was set, use that, otherwise fallback to attribute (if set).
     if (style && style->hasTransform()) {
@@ -267,7 +267,7 @@ PassRefPtrWillBeRawPtr<SVGRectTearOff> SVGGraphicsElement::getBBoxFromJavascript
     return SVGRectTearOff::create(SVGRect::create(getBBox()), 0, PropertyIsNotAnimVal);
 }
 
-RenderObject* SVGGraphicsElement::createRenderer(RenderStyle*)
+RenderObject* SVGGraphicsElement::createRenderer(const RenderStyle*)
 {
     // By default, any subclass is expected to do path-based drawing
     return new RenderSVGPath(this);