Fix vertex count estimate in GrTessellator.

src/gpu/GrTessellator.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTessellator.h"
 
 #include "GrPathUtils.h"
@@ skipping 417 matching lines @@
             fTail->addEdge(e);
             fCount++;
             if (partner) {
                 partner->addEdge(e, side, alloc);
                 poly = partner;
             } else {
                 MonotonePoly* m = ALLOC_NEW(MonotonePoly, (e, side), alloc);
                 m->fPrev = fTail;
                 fTail->fNext = m;
                 fTail = m;
-                fCount += 2;
             }
         }
         return poly;
     }
     SkPoint* emit(SkPoint *data) {
         if (fCount < 3) {
             return data;
         }
         LOG("emit() %d, size %d\n", fID, fCount);
         for (MonotonePoly* m = fHead; m != nullptr; m = m->fNext) {
@@ skipping 992 matching lines @@
         }
     }
     int actualCount = static_cast<int>(vertsEnd - *verts);
     SkASSERT(actualCount <= count);
     SkASSERT(pointsEnd - points == actualCount);
     delete[] points;
     return actualCount;
 }
 
 } // namespace