Use smart pointers for class owned pointers

xfa/fwl/basewidget/cfx_barcode.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef XFA_FWL_BASEWIDGET_CFX_BARCODE_H_
 #define XFA_FWL_BASEWIDGET_CFX_BARCODE_H_
 
+#include <memory>
+
 #include "core/fxcrt/include/fx_coordinates.h"
 #include "core/fxcrt/include/fx_string.h"
 #include "core/fxcrt/include/fx_system.h"
 #include "core/fxge/include/fx_dib.h"
 #include "xfa/fxbarcode/include/BC_Library.h"
 
 class CBC_CodeBase;
 class CFX_Font;
 class CFX_RenderDevice;
 class CFX_Matrix;
@@ skipping 25 matching lines @@
   FX_BOOL SetFontColor(FX_ARGB color);
   FX_BOOL SetTextLocation(BC_TEXT_LOC location);
   FX_BOOL SetWideNarrowRatio(int32_t ratio);
   FX_BOOL SetStartChar(FX_CHAR start);
   FX_BOOL SetEndChar(FX_CHAR end);
   FX_BOOL SetVersion(int32_t version);
   FX_BOOL SetErrorCorrectionLevel(int32_t level);
   FX_BOOL SetTruncated(FX_BOOL truncated);
 
  protected:
-  CBC_CodeBase* m_pBCEngine;
+  std::unique_ptr<CBC_CodeBase> m_pBCEngine;
 };
 
 #endif  // XFA_FWL_BASEWIDGET_CFX_BARCODE_H_