SkNonCopyable should be used with private inheritance.

include/gpu/GrClipData.h

Index: include/gpu/GrClipData.h
diff --git a/include/gpu/GrClipData.h b/include/gpu/GrClipData.h
index b06dc06e5106be920004ab8c5611c1d6226f6058..1dc4b0d5f8ca989848c53e03fcdef2496e66d9f8 100644
--- a/include/gpu/GrClipData.h
+++ b/include/gpu/GrClipData.h
@@ -20,7 +20,7 @@ struct SkIRect;
  * device coordinates (i.e., they have been translated by -fOrigin w.r.t.
  * the canvas' device coordinates).
  */
-class GrClipData : public SkNoncopyable {
+class GrClipData : SkNoncopyable {
 public:
     const SkClipStack*  fClipStack;
     SkIPoint            fOrigin;