Make code compile with clang_use_chrome_plugin (part III)

xfa/fxbarcode/oned/BC_OnedCodaBarReader.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_FXBARCODE_ONED_BC_ONEDCODABARREADER_H_
 #define XFA_FXBARCODE_ONED_BC_ONEDCODABARREADER_H_
 
 #include "core/fxcrt/include/fx_basic.h"
 #include "xfa/fxbarcode/oned/BC_OneDReader.h"
 
 class CBC_CommonBitArray;
 class CBC_OneDReader;
 
 class CBC_OnedCodaBarReader : public CBC_OneDReader {
  public:
   CBC_OnedCodaBarReader();
-  virtual ~CBC_OnedCodaBarReader();
+  ~CBC_OnedCodaBarReader() override;
+
+  // CBC_OneDReader
   CFX_ByteString DecodeRow(int32_t rowNumber,
                            CBC_CommonBitArray* row,
                            int32_t hints,
-                           int32_t& e);
+                           int32_t& e) override;
+
   CFX_Int32Array* FindAsteriskPattern(CBC_CommonBitArray* row, int32_t& e);
   FX_BOOL ArrayContains(const FX_CHAR array[], FX_CHAR key);
   FX_CHAR ToNarrowWidePattern(CFX_Int32Array* counter);
 
   static const FX_CHAR* ALPHABET_STRING;
   static const int32_t CHARACTER_ENCODINGS[22];
 
  private:
   static const int32_t minCharacterLength = 3;
   static const FX_CHAR STARTEND_ENCODING[8];
 };
 
 #endif  // XFA_FXBARCODE_ONED_BC_ONEDCODABARREADER_H_