Const-ify static s_resourceType members in RenderSVGResouce* classes

Source/core/rendering/svg/RenderSVGResourceMasker.h

 /*
  * Copyright (C) Research In Motion Limited 2009-2010. 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 35 matching lines @@
     virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true) override;
 
     bool prepareEffect(RenderObject*, GraphicsContext*&);
     void finishEffect(RenderObject*, GraphicsContext*&);
 
     FloatRect resourceBoundingBox(const RenderObject*);
 
     SVGUnitTypes::SVGUnitType maskUnits() const { return toSVGMaskElement(element())->maskUnits()->currentValue()->enumValue(); }
     SVGUnitTypes::SVGUnitType maskContentUnits() const { return toSVGMaskElement(element())->maskContentUnits()->currentValue()->enumValue(); }
 
+    static const RenderSVGResourceType s_resourceType = MaskerResourceType;
     virtual RenderSVGResourceType resourceType() const override { return s_resourceType; }
-    static const RenderSVGResourceType s_resourceType;
 
 private:
     void calculateMaskContentPaintInvalidationRect();
     void drawMaskForRenderer(GraphicsContext*, const FloatRect& targetBoundingBox);
     void createDisplayList(GraphicsContext*);
 
     RefPtr<DisplayList> m_maskContentDisplayList;
     FloatRect m_maskContentBoundaries;
 };
 
 DEFINE_RENDER_SVG_RESOURCE_TYPE_CASTS(RenderSVGResourceMasker, MaskerResourceType);
 
 }
 
 #endif