add pathops debugging

src/pathops/SkOpCoincidence.h

Index: src/pathops/SkOpCoincidence.h
diff --git a/src/pathops/SkOpCoincidence.h b/src/pathops/SkOpCoincidence.h
index cd184e353f1508ed8b7a5ed70459d24b6ec0f1b6..436fa825276d07405760dbf6e4fc3834afc442ca 100644
--- a/src/pathops/SkOpCoincidence.h
+++ b/src/pathops/SkOpCoincidence.h
@@ -264,7 +264,8 @@ private:
     }
 
     bool addOrOverlap(SkOpSegment* coinSeg, SkOpSegment* oppSeg,
-                      double coinTs, double coinTe, double oppTs, double oppTe);
+                      double coinTs, double coinTe, double oppTs, double oppTe
+                      SkDEBUGPARAMS(bool callerAborts));
     bool addOverlap(const SkOpSegment* seg1, const SkOpSegment* seg1o,
                     const SkOpSegment* seg2, const SkOpSegment* seg2o,
                     const SkOpPtT* overS, const SkOpPtT* overE);