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

Source/core/rendering/svg/RenderSVGShape.cpp

Index: Source/core/rendering/svg/RenderSVGShape.cpp
diff --git a/Source/core/rendering/svg/RenderSVGShape.cpp b/Source/core/rendering/svg/RenderSVGShape.cpp
index 559a9511a0037baf82046976eed77ac2f3e7a920..fd2f95a58a6d2aada04a1f7626d5c65401da7910 100644
--- a/Source/core/rendering/svg/RenderSVGShape.cpp
+++ b/Source/core/rendering/svg/RenderSVGShape.cpp
@@ -452,7 +452,13 @@ void RenderSVGShape::processMarkerPositions()
 
     ASSERT(m_path);
 
-    SVGMarkerData markerData(m_markerPositions);
+    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
+    if (!resources)

[fs, 2014/09/09 14:24:49]

Nit: ASSERT-ing this should suffice (shouldGenerateMarkerPositions already
checks this).

+        return;
+
+    RenderSVGResourceMarker* markerStart = resources->markerStart();
+
+    SVGMarkerData markerData(m_markerPositions, markerStart ? markerStart->orientType() == SVGMarkerOrientAutoStartReverse : false);
     m_path->apply(&markerData, SVGMarkerData::updateFromPathElement);
     markerData.pathIsDone();
 }