add conics to path ops

src/pathops/SkPathOpsCubic.h

Index: src/pathops/SkPathOpsCubic.h
diff --git a/src/pathops/SkPathOpsCubic.h b/src/pathops/SkPathOpsCubic.h
index 9932e1d1bc300917783e4aa9416dad6f938dbf54..2e72cf501d642c45817ce662294e6917281b2737 100644
--- a/src/pathops/SkPathOpsCubic.h
+++ b/src/pathops/SkPathOpsCubic.h
@@ -70,6 +70,9 @@ struct SkDCubic {
 
     int findMaxCurvature(double tValues[]) const;
     bool hullIntersects(const SkDCubic& c2, bool* isLinear) const;
+    bool hullIntersects(const SkDConic& c, bool* isLinear) const;
+    bool hullIntersects(const SkDQuad& c2, bool* isLinear) const;
+    bool hullIntersects(const SkDPoint* pts, int ptCount, bool* isLinear) const;
     bool isLinear(int startIndex, int endIndex) const;
     bool monotonicInY() const;
     void otherPts(int index, const SkDPoint* o1Pts[kPointCount - 1]) const;
@@ -80,11 +83,12 @@ struct SkDCubic {
     int searchRoots(double extremes[6], int extrema, double axisIntercept,
                     SearchAxis xAxis, double* validRoots) const;
 
-    void set(const SkPoint pts[kPointCount]) {
+    const SkDCubic& set(const SkPoint pts[kPointCount]) {
         fPts[0] = pts[0];
         fPts[1] = pts[1];
         fPts[2] = pts[2];
         fPts[3] = pts[3];
+        return *this;
     }
 
     SkDCubic subDivide(double t1, double t2) const;