Use the right point for marker orientation when closing a subpath

third_party/WebKit/Source/core/layout/svg/SVGMarkerData.h

 /*
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 88 matching lines @@
           inAngle += 360;
         return clampTo<float>((inAngle + outAngle) / 2);
       case EndMarker:
         return clampTo<float>(inAngle);
     }
 
     ASSERT_NOT_REACHED();
     return 0;
   }
 
-  void updateOutslope(const FloatPoint& point) {
+  void updateOutslope(const PathElement& element) {
     m_outslopePoints[0] = m_origin;
+    FloatPoint point = element.type == PathElementCloseSubpath
+                           ? m_subpathStart
+                           : element.points[0];
     m_outslopePoints[1] = point;
   }
 
   void updateFromPathElement(const PathElement& element) {
     // First update the outslope for the previous element.
-    updateOutslope(element.points[0]);
+    updateOutslope(element);
 
     // Record the marker for the previous element.
     if (m_elementIndex > 0) {
       SVGMarkerType markerType = m_elementIndex == 1 ? StartMarker : MidMarker;
       m_positions.append(
           MarkerPosition(markerType, m_origin, currentAngle(markerType)));
     }
 
     // Update our marker data for this element.
     updateMarkerDataForPathElement(element);
@@ skipping 14 matching lines @@
         m_inslopePoints[1] = points[2];
         m_origin = points[2];
         break;
       case PathElementMoveToPoint:
         m_subpathStart = points[0];
       case PathElementAddLineToPoint:
         updateInslope(points[0]);
         m_origin = points[0];
         break;
       case PathElementCloseSubpath:
-        updateInslope(points[0]);
+        updateInslope(m_subpathStart);
         m_origin = m_subpathStart;
         m_subpathStart = FloatPoint();
     }
   }
 
   void updateInslope(const FloatPoint& point) {
     m_inslopePoints[0] = m_origin;
     m_inslopePoints[1] = point;
   }
 
   Vector<MarkerPosition>& m_positions;
   unsigned m_elementIndex;
   FloatPoint m_origin;
   FloatPoint m_subpathStart;
   FloatPoint m_inslopePoints[2];
   FloatPoint m_outslopePoints[2];
   bool m_autoStartReverse;
 };
 
 }  // namespace blink
 
 #endif  // SVGMarkerData_h