Refactor m_absoluteTransform out of SVGFilter and into base class.

Source/core/svg/graphics/filters/SVGFilter.h

 /*
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
+ * Copyright (C) 2013 Google Inc. 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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
@@ skipping 20 matching lines @@
 
 namespace WebCore {
 
 class SVGFilter : public Filter {
 public:
     static PassRefPtr<SVGFilter> create(const AffineTransform&, const FloatRect&, const FloatRect&, const FloatRect&, bool);
 
     FloatRect filterRegionInUserSpace() const { return m_filterRegion; }
     virtual FloatRect filterRegion() const { return m_absoluteFilterRegion; }
 
-    virtual FloatPoint mapAbsolutePointToLocalPoint(const FloatPoint& point) const { return m_absoluteTransform.inverse().mapPoint(point); }
-    const AffineTransform& absoluteTransform() const { return m_absoluteTransform; }
-
     virtual float applyHorizontalScale(float value) const;
     virtual float applyVerticalScale(float value) const;
 
     virtual FloatRect sourceImageRect() const { return m_absoluteSourceDrawingRegion; }
     FloatRect targetBoundingBox() const { return m_targetBoundingBox; }
 
 private:
     SVGFilter(const AffineTransform& absoluteTransform, const FloatRect& absoluteSourceDrawingRegion, const FloatRect& targetBoundingBox, const FloatRect& filterRegion, bool effectBBoxMode);
 
-    AffineTransform m_absoluteTransform;
     FloatRect m_absoluteSourceDrawingRegion;
     FloatRect m_targetBoundingBox;
     FloatRect m_absoluteFilterRegion;
     FloatRect m_filterRegion;
     bool m_effectBBoxMode;
 };
 
 } // namespace WebCore
 
 #endif // ENABLE(SVG)
 
 #endif // SVGFilter_h