Rewriting path writer

src/pathops/SkPathOpsCurve.h

Index: src/pathops/SkPathOpsCurve.h
diff --git a/src/pathops/SkPathOpsCurve.h b/src/pathops/SkPathOpsCurve.h
index dc9cec97e46c569a6aa76b47f7d012942fbbd37a..2b50864e5b875191c2e9fa0816a0fb81fa6155a1 100644
--- a/src/pathops/SkPathOpsCurve.h
+++ b/src/pathops/SkPathOpsCurve.h
@@ -82,6 +82,19 @@ struct SkDCurve {
                        double s, double e, SkPathOpsBounds*);
 };
 
+class SkDCurveSweep {
+public:
+    bool isCurve() const { return fIsCurve; }
+    bool isOrdered() const { return fOrdered; }
+    void setCurveHullSweep(SkPath::Verb verb);
+
+    SkDCurve fCurve;
+    SkDVector fSweep[2];
+private:
+    bool fIsCurve;
+    bool fOrdered;  // cleared when a cubic's control point isn't between the sweep vectors
+
+};
 
 extern SkDPoint (SkDCurve::* const Top[])(const SkPoint curve[], SkScalar cWeight,
     double tStart, double tEnd, double* topT);