Factor SVGMarkerPainter into SVGShapePainter

Source/core/paint/SVGShapePainter.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SVGShapePainter_h
 #define SVGShapePainter_h
 
 namespace blink {
 
+struct MarkerPosition;
 struct PaintInfo;
 class FloatPoint;
 class GraphicsContext;
 class Path;
+class RenderSVGResourceMarker;
 class RenderSVGShape;
 
 class SVGShapePainter {
 public:
     SVGShapePainter(RenderSVGShape& renderSVGShape) : m_renderSVGShape(renderSVGShape) { }
 
     void paint(PaintInfo&);
 
 private:
     void fillShape(GraphicsContext*);
     void strokeShape(GraphicsContext*);
 
     void paintMarkers(PaintInfo&);
+    void paintMarker(PaintInfo&, RenderSVGResourceMarker&, const MarkerPosition&, float);
     void strokeZeroLengthLineCaps(GraphicsContext*);
     Path* zeroLengthLinecapPath(const FloatPoint&) const;
 
     RenderSVGShape& m_renderSVGShape;
 };
 
 } // namespace blink
 
 #endif // SVGShapePainter_h