added stroking support to GrAALinearizingConvexPathRenderer

src/core/SkPathPriv.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPathPriv_DEFINED
 #define SkPathPriv_DEFINED
 
@@ skipping 37 matching lines @@
      *  cheapComputDirection() and if that computed direction matches the
      *  specified direction. If dir is kUnknown, returns true if the direction
      *  cannot be computed.
      */
     static bool CheapIsFirstDirection(const SkPath& path, FirstDirection dir) {
         FirstDirection computedDir = kUnknown_FirstDirection;
         (void)CheapComputeFirstDirection(path, &computedDir);
         return computedDir == dir;
     }
 
+    static bool LastVerbIsClose(const SkPath& path) {
+        int count = path.countVerbs();
+        return count >= 1 && path.fPathRef->verbs()[~(count - 1)] == SkPath::Verb::kClose_Verb;
+    }
 };
 
 #endif