Make code compile with clang_use_chrome_plugin (part III)

xfa/fxbarcode/oned/BC_OnedCode128Writer.h

Index: xfa/fxbarcode/oned/BC_OnedCode128Writer.h
diff --git a/xfa/fxbarcode/oned/BC_OnedCode128Writer.h b/xfa/fxbarcode/oned/BC_OnedCode128Writer.h
index b2530642af83bb2c8fb5afc4ded3ee47ac430ab5..7338b569522c6d0b5b448b664c779696f5b2d0c5 100644
--- a/xfa/fxbarcode/oned/BC_OnedCode128Writer.h
+++ b/xfa/fxbarcode/oned/BC_OnedCode128Writer.h
@@ -15,26 +15,29 @@ 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) override;
+  CFX_WideString FilterContents(const CFX_WideStringC& contents) override;
 
-  FX_BOOL CheckContentValidity(const CFX_WideStringC& contents);
-  CFX_WideString FilterContents(const CFX_WideStringC& contents);
   FX_BOOL SetTextLocation(BC_TEXT_LOC location);
+
   BC_TYPE GetType();
 
  private: