[SVG2] Add support for marker orient="auto-start-reverse".

Source/core/rendering/svg/RenderSVGResourceMarker.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 39 matching lines @@
     virtual void calcViewport() OVERRIDE;
 
     virtual const AffineTransform& localToParentTransform() const OVERRIDE;
     AffineTransform markerTransformation(const FloatPoint& origin, float angle, float strokeWidth) const;
 
     virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short) OVERRIDE { return false; }
 
     FloatPoint referencePoint() const;
     float angle() const;
     SVGMarkerUnitsType markerUnits() const { return toSVGMarkerElement(element())->markerUnits()->currentValue()->enumValue(); }
+    SVGMarkerOrientType orientType() const { return toSVGMarkerElement(element())->orientType()->currentValue()->enumValue(); }
 
     virtual RenderSVGResourceType resourceType() const OVERRIDE { return s_resourceType; }
     static const RenderSVGResourceType s_resourceType;
 
 private:
     // Generates a transformation matrix usable to render marker content. Handles scaling the marker content
     // acording to SVGs markerUnits="strokeWidth" concept, when a strokeWidth value != -1 is passed in.
     AffineTransform markerContentTransformation(const AffineTransform& contentTransformation, const FloatPoint& origin, float strokeWidth = -1) const;
 
     AffineTransform viewportTransform() const;
 
     mutable AffineTransform m_localToParentTransform;
     FloatRect m_viewport;
 };
 
 DEFINE_RENDER_SVG_RESOURCE_TYPE_CASTS(RenderSVGResourceMarker, MarkerResourceType);
 
 }
 
 #endif