Do not apply hairline optimization for paths if nv_path_rendering is used

src/gpu/GrPathRenderer.h

Index: src/gpu/GrPathRenderer.h
diff --git a/src/gpu/GrPathRenderer.h b/src/gpu/GrPathRenderer.h
index f86eb9fe54783b502875c7dc048e2041560c64a2..88665c1d423eedd03259c5c54fd805259c843b11 100644
--- a/src/gpu/GrPathRenderer.h
+++ b/src/gpu/GrPathRenderer.h
@@ -13,6 +13,7 @@
 #include "GrPathRendererChain.h"
 #include "GrStencil.h"
 
+#include "SkDrawProcs.h"
 #include "SkStrokeRec.h"
 #include "SkTArray.h"
 
@@ -137,6 +138,20 @@ public:
         this->onStencilPath(path, stroke, target);
     }
 
+    // Helper for determining if we can treat a thin stroke as a hairline w/ coverage.
+    // If we can, we draw lots faster (raster device does this same test).
+    static bool IsStrokeHairlineOrEquivalent(const SkStrokeRec& stroke, const SkMatrix& matrix,
+                                             SkScalar* outCoverage) {
+        if (stroke.isHairlineStyle()) {
+            if (NULL != outCoverage) {
+                *outCoverage = SK_Scalar1;
+            }
+            return true;
+        }
+        return stroke.getStyle() == SkStrokeRec::kStroke_Style &&
+            SkDrawTreatAAStrokeAsHairline(stroke.getWidth(), matrix, outCoverage);
+    }
+
 protected:
     /**
      * Subclass overrides if it has any limitations of stenciling support.