SkNonCopyable should be used with private inheritance.

experimental/PdfViewer/inc/SkPdfRenderer.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 SkPdfRenderer_DEFINED
 #define SkPdfRenderer_DEFINED
@@ skipping 11 matching lines @@
 enum SkPdfContent {
     kNoForms_SkPdfContent,
     kAll_SkPdfContent,
 };
 
 /** \class SkPdfRenderer
  *
  *  The SkPdfRenderer class is used to render a PDF into canvas.
  *
  */
-class SkPdfRenderer : public SkNoncopyable {
+class SkPdfRenderer : SkNoncopyable {
 public:
     // Create a new renderer from a stream.
     // TODO(edisonn): replace it with a SkSmartStream which would know to to efficiently
     // deal with a HTTP stream.
     // FIXME: Untested.
     static SkPdfRenderer* CreateFromStream(SkStream*);
     // Create a new renderer from a file.
     static SkPdfRenderer* CreateFromFile(const char* filename);
 
     ~SkPdfRenderer();
@@ skipping 28 matching lines @@
                                double dpi = 72.0);
 
 // TODO(edisonn): add options to render forms, checkboxes, ...
 // TODO(edisonn): Add API for Forms viewing and editing
 // e.g. SkBitmap getPage(int page);
 //      int formsCount();
 //      SkForm getForm(int formID); // SkForm(SkRect, .. other data)
 // TODO (edisonn): Add intend when loading pdf, for example: for viewing, for parsing content, ...
 
 #endif  // SkPdfRenderer_DEFINED