add conics to path ops

src/pathops/SkPathOpsQuad.h

Index: src/pathops/SkPathOpsQuad.h
diff --git a/src/pathops/SkPathOpsQuad.h b/src/pathops/SkPathOpsQuad.h
index 81638cf0bc012c33d5a1b303680091fa410de25c..4f1bee8b11fcb6f0af76141012640d4342538a50 100644
--- a/src/pathops/SkPathOpsQuad.h
+++ b/src/pathops/SkPathOpsQuad.h
@@ -41,10 +41,11 @@ struct SkDQuad {
 
     static bool IsCubic() { return false; }
 
-    void set(const SkPoint pts[kPointCount]) {
+    const SkDQuad& set(const SkPoint pts[kPointCount]) {
         fPts[0] = pts[0];
         fPts[1] = pts[1];
         fPts[2] = pts[2];
+        return *this;
     }
 
     const SkDPoint& operator[](int n) const { SkASSERT(n >= 0 && n < kPointCount); return fPts[n]; }
@@ -56,6 +57,8 @@ struct SkDQuad {
     SkDVector dxdyAtT(double t) const;
     static int FindExtrema(double a, double b, double c, double tValue[1]);
     bool hullIntersects(const SkDQuad& , bool* isLinear) const;
+    bool hullIntersects(const SkDConic& , bool* isLinear) const;
+    bool hullIntersects(const SkDCubic& , bool* isLinear) const;
     bool isLinear(int startIndex, int endIndex) const;
     bool monotonicInY() const;
     double nearestT(const SkDPoint&) const;
@@ -77,6 +80,7 @@ struct SkDQuad {
         quad.set(pts);
         return quad.subDivide(a, c, t1, t2);
     }
+    SkDConic toConic() const;
     SkDCubic toCubic() const;
     SkDPoint top(double startT, double endT) const;