Add SkNWayCanvas comment API overrides.

include/utils/SkNWayCanvas.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkNWayCanvas_DEFINED
 #define SkNWayCanvas_DEFINED
@@ skipping 56 matching lines @@
     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&) SK_OVERRIDE;
 
     virtual SkBounder* setBounder(SkBounder*) SK_OVERRIDE;
     virtual SkDrawFilter* setDrawFilter(SkDrawFilter*) SK_OVERRIDE;
 
+    virtual void beginCommentGroup(const char* description) SK_OVERRIDE;
+    virtual void addComment(const char* kywd, const char* value) SK_OVERRIDE;
+    virtual void endCommentGroup() SK_OVERRIDE;
+
 private:
     SkTDArray<SkCanvas*> fList;
 
     class Iter;
 
     typedef SkCanvas INHERITED;
 };
 
 
 #endif