Make code compile with clang_use_chrome_plugin (part III)

xfa/fxbarcode/oned/BC_OnedEAN8Writer.h

Index: xfa/fxbarcode/oned/BC_OnedEAN8Writer.h
diff --git a/xfa/fxbarcode/oned/BC_OnedEAN8Writer.h b/xfa/fxbarcode/oned/BC_OnedEAN8Writer.h
index 706393eb03df9d7549cb4a103f7987c3fa5e5db6..e5990115e8e1b1fd9145b64a455d477ada0a474f 100644
--- a/xfa/fxbarcode/oned/BC_OnedEAN8Writer.h
+++ b/xfa/fxbarcode/oned/BC_OnedEAN8Writer.h
@@ -21,31 +21,33 @@ class CBC_OnedEAN8Writer : public CBC_OneDimWriter {
 
  public:
   CBC_OnedEAN8Writer();
-  virtual ~CBC_OnedEAN8Writer();
+  ~CBC_OnedEAN8Writer() override;
 
+  // CBC_OneDimWriter
   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,
                   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,
                   int32_t& outLength,
-                  int32_t& e);
+                  int32_t& e) override;
 
   void RenderResult(const CFX_WideStringC& contents,
                     uint8_t* code,
                     int32_t codeLength,
                     FX_BOOL isDevice,
-                    int32_t& e);
-  FX_BOOL CheckContentValidity(const CFX_WideStringC& contents);
-  CFX_WideString FilterContents(const CFX_WideStringC& contents);
-  void SetDataLength(int32_t length);
+                    int32_t& e) override;
+  FX_BOOL CheckContentValidity(const CFX_WideStringC& contents) override;
+  CFX_WideString FilterContents(const CFX_WideStringC& contents) override;
+  void SetDataLength(int32_t length) override;
+
   FX_BOOL SetTextLocation(BC_TEXT_LOC location);
   int32_t CalcChecksum(const CFX_ByteString& contents);
 
@@ -56,7 +58,7 @@ class CBC_OnedEAN8Writer : public CBC_OneDimWriter {
                  const CFX_Matrix* matrix,
                  int32_t barWidth,
                  int32_t multiple,
-                 int32_t& e);
+                 int32_t& e) override;
 };
 
 #endif  // XFA_FXBARCODE_ONED_BC_ONEDEAN8WRITER_H_