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, 2 insertions, 2 deletions

diff --git a/xfa/fxbarcode/oned/BC_OnedEAN8Reader.h b/xfa/fxbarcode/oned/BC_OnedEAN8Reader.h
index ab2d5e3178..756565dd8f 100644
--- a/xfa/fxbarcode/oned/BC_OnedEAN8Reader.h
+++ b/xfa/fxbarcode/oned/BC_OnedEAN8Reader.h
@@ -14,13 +14,13 @@ class CBC_CommonBitArray;
 class CBC_OnedEAN8Reader : public CBC_OneDimReader {
  public:
   CBC_OnedEAN8Reader();
-  virtual ~CBC_OnedEAN8Reader();
+  ~CBC_OnedEAN8Reader() override;
 
  protected:
   int32_t DecodeMiddle(CBC_CommonBitArray*,
                        CFX_Int32Array* startRange,
                        CFX_ByteString& result,
-                       int32_t& e);
+                       int32_t& e) override;
 };
 
 #endif  // XFA_FXBARCODE_ONED_BC_ONEDEAN8READER_H_