Prevent reading stale/invalid data when applying a <pattern>

Source/core/rendering/svg/RenderSVGResourcePattern.h

 /*
  * 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 45 matching lines @@
 
     virtual RenderSVGResourceType resourceType() const OVERRIDE { return s_resourceType; }
     static const RenderSVGResourceType s_resourceType;
 
 private:
     bool buildTileImageTransform(RenderObject*, const PatternAttributes&, const SVGPatternElement*, FloatRect& patternBoundaries, AffineTransform& tileImageTransform) const;
 
     PassOwnPtr<ImageBuffer> createTileImage(const PatternAttributes&, const FloatRect& tileBoundaries,
                                             const FloatRect& absoluteTileBoundaries, const AffineTransform& tileImageTransform) const;
 
-    PatternData* buildPattern(RenderObject*, unsigned short resourceMode);
+    PatternData* buildPattern(RenderObject*, const SVGPatternElement*);
 
     bool m_shouldCollectPatternAttributes : 1;
     PatternAttributes m_attributes;
     HashMap<RenderObject*, OwnPtr<PatternData> > m_patternMap;
 };
 
 }
 
 #endif