path ops -- rewrite angle sort

src/pathops/SkPathOpsCommon.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkOpEdgeBuilder.h"
 #include "SkPathOpsCommon.h"
 #include "SkPathWriter.h"
 #include "SkTSort.h"
@@ skipping 116 matching lines @@
             *chase.insert(0) = span;
    #else
             *chase.append() = span;
    #endif
             return last->segment();
         }
         if (done == angles.count()) {
             continue;
         }
         SkTDArray<SkOpAngle*> sorted;
-        bool sortable = SkOpSegment::SortAngles(angles, &sorted);
+        bool sortable = SkOpSegment::SortAngles(angles, &sorted,
+                SkOpSegment::kMayBeUnordered_SortAngleKind);
         int angleCount = sorted.count();
 #if DEBUG_SORT
         sorted[0]->segment()->debugShowSort(__FUNCTION__, sorted, 0, 0, 0);
 #endif
         if (!sortable) {
             continue;
         }
         // find first angle, initialize winding to computed fWindSum
         int firstIndex = -1;
         const SkOpAngle* angle;
@@ skipping 426 matching lines @@
             }
         }
     } while (rIndex < count);
 #if DEBUG_ASSEMBLE
     for (rIndex = 0; rIndex < count; ++rIndex) {
        SkASSERT(sLink[rIndex] == SK_MaxS32);
        SkASSERT(eLink[rIndex] == SK_MaxS32);
     }
 #endif
 }