Make code compile with clang_use_chrome_plugin (part III)

This change contains files in xfa/fxbarcode directory.
This is part of the efforts to make PDFium code compilable
by Clang chromium style plugins.

The changes are mainly the following:
-- move inline constructor/destructor of complex class/struct out-of-line;
-- add constructor/destructor of complex class/struct if not
 explicitly defined;
-- add explicit out-of-line copy constructor when needed;
-- move inline virtual functions out-of-line;
-- Properly mark virtual functions with 'override';
-- some minor cleanups;

BUG=pdfium:469

Review-Url: https://codereview.chromium.org/2067903002

1 files changed, 5 insertions, 2 deletions

diff --git a/xfa/fxbarcode/oned/BC_OnedCodaBarReader.h b/xfa/fxbarcode/oned/BC_OnedCodaBarReader.h
index 8fd2177a04..ce902bff5e 100644
--- a/xfa/fxbarcode/oned/BC_OnedCodaBarReader.h
+++ b/xfa/fxbarcode/oned/BC_OnedCodaBarReader.h
@@ -16,11 +16,14 @@ 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);