Reland of path ops: fix conic weight and partial coincidence

src/pathops/SkPathOpsConic.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPathOpsConic_DEFINED
 #define SkPathOpsConic_DEFINED
 
@@ skipping 18 matching lines @@
 
     void debugInit() {
         fPts.debugInit();
     }
 
     SkDConic flip() const {
         SkDConic result = {{{fPts[2], fPts[1], fPts[0]}}, fWeight};
         return result;
     }
 
-    static bool IsCubic() { return false; }
+    static bool IsConic() { return true; }
 
     const SkDConic& set(const SkPoint pts[kPointCount], SkScalar weight) {
         fPts.set(pts);
         fWeight = weight;
         return *this;
     }
 
     const SkDPoint& operator[](int n) const { return fPts[n]; }
     SkDPoint& operator[](int n) { return fPts[n]; }
 
@@ skipping 64 matching lines @@
     }
 
     // utilities callable by the user from the debugger when the implementation code is linked in
     void dump() const;
     void dumpID(int id) const;
     void dumpInner() const;
 };
 
 
 #endif