override new virtual onDrawDRRect in util canvas subclasses

include/utils/SkLuaCanvas.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 SkLuaCanvas_DEFINED
 #define SkLuaCanvas_DEFINED
 
@@ skipping 54 matching lines @@
                                 const SkPath& path, const SkMatrix* matrix,
                                 const SkPaint& paint) SK_OVERRIDE;
     virtual void drawPicture(SkPicture&) SK_OVERRIDE;
     virtual void drawVertices(VertexMode vmode, int vertexCount,
                               const SkPoint vertices[], const SkPoint texs[],
                               const SkColor colors[], SkXfermode* xmode,
                               const uint16_t indices[], int indexCount,
                               const SkPaint& paint) SK_OVERRIDE;
     virtual void drawData(const void* data, size_t length) SK_OVERRIDE;
 
+protected:
+    virtual void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) SK_OVERRIDE;
+
 private:
     lua_State*  fL;
     SkString    fFunc;
 
     void sendverb(const char verb[]);
 
     typedef SkCanvas INHERITED;
 };
 
 #endif