SkNonCopyable should be used with private inheritance.

src/gpu/GrRedBlackTree.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 GrRedBlackTree_DEFINED
 #define GrRedBlackTree_DEFINED
 
@@ skipping 22 matching lines @@
  * is called on insert and remove. Useful for debugging but very slow.
  */
 #define DEEP_VALIDATE 0
 
 /**
  * A sorted tree that uses the red-black tree algorithm. Allows duplicate
  * entries. Data is of type T and is compared using functor C. A single C object
  * will be created and used for all comparisons.
  */
 template <typename T, typename C = GrLess<T> >
-class GrRedBlackTree : public SkNoncopyable {
+class GrRedBlackTree : SkNoncopyable {
 public:
     /**
      * Creates an empty tree.
      */
     GrRedBlackTree();
     virtual ~GrRedBlackTree();
 
     /**
      * Class used to iterater through the tree. The valid range of the tree
      * is given by [begin(), end()). It is legal to dereference begin() but not
@@ skipping 885 matching lines @@
                     return validateChildRelationsFailed();
                 }
             }
         }
     }
     return true;
 }
 #endif
 
 #endif