Reland of path ops: fix conic weight and partial coincidence

src/pathops/SkPathOpsRect.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkPathOpsRect_DEFINED
 #define SkPathOpsRect_DEFINED
 
 #include "SkPathOpsPoint.h"
 
 struct SkDRect {
     double fLeft, fTop, fRight, fBottom;
 
     void add(const SkDPoint& pt) {
         fLeft = SkTMin(fLeft, pt.fX);
         fTop = SkTMin(fTop, pt.fY);
         fRight = SkTMax(fRight, pt.fX);
         fBottom = SkTMax(fBottom, pt.fY);
     }
 
     bool contains(const SkDPoint& pt) const {
         return approximately_between(fLeft, pt.fX, fRight)
                 && approximately_between(fTop, pt.fY, fBottom);
     }
 
+    void debugInit();
+
     bool intersects(const SkDRect& r) const {
         SkASSERT(fLeft <= fRight);
         SkASSERT(fTop <= fBottom);
         SkASSERT(r.fLeft <= r.fRight);
         SkASSERT(r.fTop <= r.fBottom);
         return r.fLeft <= fRight && fLeft <= r.fRight && r.fTop <= fBottom && fTop <= r.fBottom;
     }
 
     void set(const SkDPoint& pt) {
         fLeft = fRight = pt.fX;
@@ skipping 21 matching lines @@
     void setBounds(const SkDCubic& curve, const SkDCubic& sub, double tStart, double tEnd);
 
     void setBounds(const SkDQuad& curve) {
         setBounds(curve, curve, 0, 1);
     }
 
     void setBounds(const SkDQuad& curve, const SkDQuad& sub, double tStart, double tEnd);
 };
 
 #endif