Make code compile with clang_use_chrome_plugin (part III)

xfa/fxbarcode/oned/BC_OnedCode128Writer.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_ONEDCODE128WRITER_H_
 #define XFA_FXBARCODE_ONED_BC_ONEDCODE128WRITER_H_
 
 #include "core/fxcrt/include/fx_string.h"
 #include "core/fxcrt/include/fx_system.h"
 #include "xfa/fxbarcode/oned/BC_OneDimWriter.h"
 
 class CBC_OnedCode128Writer : public CBC_OneDimWriter {
  public:
   CBC_OnedCode128Writer();
   explicit CBC_OnedCode128Writer(BC_TYPE type);
-  virtual ~CBC_OnedCode128Writer();
+  ~CBC_OnedCode128Writer() override;
 
+  // CBC_OneDimWriter
   uint8_t* Encode(const CFX_ByteString& contents,
                   BCFORMAT format,
                   int32_t& outWidth,
                   int32_t& outHeight,
                   int32_t hints,
-                  int32_t& e);
+                  int32_t& e) override;
   uint8_t* Encode(const CFX_ByteString& contents,
                   BCFORMAT format,
                   int32_t& outWidth,
                   int32_t& outHeight,
-                  int32_t& e);
+                  int32_t& e) override;
   uint8_t* Encode(const CFX_ByteString& contents,
                   int32_t& outLength,
-                  int32_t& e);
+                  int32_t& e) override;
 
-  FX_BOOL CheckContentValidity(const CFX_WideStringC& contents);
-  CFX_WideString FilterContents(const CFX_WideStringC& contents);
+  FX_BOOL CheckContentValidity(const CFX_WideStringC& contents) override;
+  CFX_WideString FilterContents(const CFX_WideStringC& contents) override;
+
   FX_BOOL SetTextLocation(BC_TEXT_LOC location);
+
   BC_TYPE GetType();
 
  private:
   static const int32_t CODE_CODE_B = 100;
   static const int32_t CODE_CODE_C = 99;
   static const int32_t CODE_START_B = 104;
   static const int32_t CODE_START_C = 105;
   static const int32_t CODE_STOP = 106;
 
   FX_BOOL IsDigits(const CFX_ByteString& contents,
                    int32_t start,
                    int32_t length);
   int32_t Encode128B(const CFX_ByteString& contents,
                      CFX_ArrayTemplate<const int32_t*>* patterns);
   int32_t Encode128C(const CFX_ByteString& contents,
                      CFX_ArrayTemplate<const int32_t*>* patterns);
 
   BC_TYPE m_codeFormat;
 };
 
 #endif  // XFA_FXBARCODE_ONED_BC_ONEDCODE128WRITER_H_