Make RenderObject::style() return a const object

Source/core/rendering/svg/SVGRenderSupport.h

 /**
  * Copyright (C) 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * 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
@@ skipping 66 matching lines @@
     static void mapLocalToContainer(const RenderObject*, const RenderLayerModelObject* paintInvalidationContainer, TransformState&, bool* wasFixed = 0, const PaintInvalidationState* = 0);
     static const RenderObject* pushMappingToContainer(const RenderObject*, const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap&);
 
     // Shared between SVG renderers and resources.
     static void applyStrokeStyleToContext(GraphicsContext*, const RenderStyle*, const RenderObject*);
     static void applyStrokeStyleToStrokeData(StrokeData*, const RenderStyle*, const RenderObject*);
 
     // Update the GC state (on |paintInfo.context|) for painting |renderer|
     // using |style|. |resourceMode| is used to decide between fill/stroke.
     // Previous state will be saved (if needed) using |stateSaver|.
-    static bool updateGraphicsContext(const PaintInfo&, GraphicsContextStateSaver&, RenderStyle*, RenderObject&, RenderSVGResourceMode, const AffineTransform* additionalPaintServerTransform = 0);
+    static bool updateGraphicsContext(const PaintInfo&, GraphicsContextStateSaver&, const RenderStyle*, RenderObject&, RenderSVGResourceMode, const AffineTransform* additionalPaintServerTransform = 0);
 
     // Determines if any ancestor's transform has changed.
     static bool transformToRootChanged(RenderObject*);
 
     // FIXME: These methods do not belong here.
     static const RenderSVGRoot* findTreeRootObject(const RenderObject*);
 
     // Helper method for determining if a RenderObject marked as text (isText()== true)
     // can/will be rendered as part of a <text>.
     static bool isRenderableTextNode(const RenderObject*);
@@ skipping 18 matching lines @@
             return true;
         if (child->hasNonIsolatedBlendingDescendants() && !willIsolateBlendingDescendantsForObject(child))
             return true;
     }
     return false;
 }
 
 } // namespace blink
 
 #endif // SVGRenderSupport_h