SkNonCopyable should be used with private inheritance.

experimental/PdfViewer/inc/SkPdfContext.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 SkPdfContext_DEFINED
 #define SkPdfContext_DEFINED
 
 #include "SkMatrix.h"
 #include "SkPdfGraphicsState.h"
 #include "SkPdfNativeTokenizer.h"
 #include "SkTDStackNester.h"
 #include "SkTypes.h"
 
 class SkCanvas;
 class SkPdfNativeDoc;
 class SkPdfNativeObject;
 
 /**
  *   The context of the drawing. The document we draw from, the current stack of
  *   objects, ...
  */
-class SkPdfContext : public SkNoncopyable {
+class SkPdfContext : SkNoncopyable {
 public:
     // FIXME (scroggo): Add functions for accessing these.
     SkTDStackNester<SkPdfNativeObject*>  fObjectStack;
     SkTDStackNester<SkPdfGraphicsState>  fStateStack;
     SkPdfGraphicsState              fGraphicsState;
     SkPdfNativeDoc*                 fPdfDoc;
     SkMatrix                        fOriginalMatrix;
 
     // Does not take ownership of the doc.
     explicit SkPdfContext(SkPdfNativeDoc* doc);
 
     /**
      *  Parse the stream and draw its commands to the canvas.
      *  FIXME (scroggo): May not be the best place for this, but leaving here
      *  for now, since it uses SkPdfContext's members.
      */
     void parseStream(SkPdfNativeObject* stream, SkCanvas* canvas);
 
 private:
     // FIXME (scroggo): Is this the right place for the allocator?
     SkPdfAllocator fTmpPageAllocator;
 };
 #endif // SkPdfContext_DEFINED