pathops coincident work

src/pathops/SkOpContour.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkOpContour_DEFINED
 #define SkOpContour_DEFINED
 
 #include "SkOpSegment.h"
@@ skipping 106 matching lines @@
     }
 
     const SkOpCoincidence* debugCoincidence() const {
         return this->globalState()->coincidence();
     }
 
 #if DEBUG_COINCIDENCE_VERBOSE
     void debugCheckHealth(const char* id, SkPathOpsDebug::GlitchLog* ) const;
 #endif
 
-    SkOpContour* debugContour(int id) {
+    SkOpContour* debugContour(int id) const {
         return SkDEBUGRELEASE(this->globalState()->debugContour(id), nullptr);
     }
 
 #if DEBUG_COINCIDENCE_VERBOSE
     void debugMissingCoincidence(const char* id, SkPathOpsDebug::GlitchLog* log) const;
 #endif
 
     const SkOpPtT* debugPtT(int id) const {
         return SkDEBUGRELEASE(this->globalState()->debugPtT(id), nullptr);
     }
@@ skipping 274 matching lines @@
     bool fXor;  // set if original path had even-odd fill
     bool fOppXor;  // set if opposite path had even-odd fill
     SkDEBUGCODE(int fID);
     SkDEBUGCODE(mutable int fDebugIndent);
 };
 
 class SkOpContourHead : public SkOpContour {
 };
 
 #endif