SkNonCopyable should be used with private inheritance.

src/gpu/GrClipMaskCache.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrClipMaskCache_DEFINED
 #define GrClipMaskCache_DEFINED
 
 #include "GrContext.h"
 #include "SkClipStack.h"
 #include "SkTypes.h"
 
 class GrTexture;
 
 /**
  * The stencil buffer stores the last clip path - providing a single entry
  * "cache". This class provides similar functionality for AA clip paths
  */
-class GrClipMaskCache : public SkNoncopyable {
+class GrClipMaskCache : SkNoncopyable {
 public:
     GrClipMaskCache();
 
     ~GrClipMaskCache() {
 
         while (!fStack.empty()) {
             GrClipStackFrame* temp = (GrClipStackFrame*) fStack.back();
             temp->~GrClipStackFrame();
             fStack.pop_back();
         }
@@ skipping 194 matching lines @@
         SkIRect                 fLastBound;
     };
 
     GrContext*   fContext;
     SkDeque      fStack;
 
     typedef SkNoncopyable INHERITED;
 };
 
 #endif // GrClipMaskCache_DEFINED