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/datamatrix/BC_DataMatrixSymbolInfo144.h b/xfa/fxbarcode/datamatrix/BC_DataMatrixSymbolInfo144.h
index 4d6cdc1291..2cd0cd0e6f 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixSymbolInfo144.h
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixSymbolInfo144.h
@@ -12,9 +12,9 @@
 class CBC_DataMatrixSymbolInfo144 : public CBC_SymbolInfo {
  public:
   CBC_DataMatrixSymbolInfo144();
-  virtual ~CBC_DataMatrixSymbolInfo144();
+  ~CBC_DataMatrixSymbolInfo144() override;
+
   int32_t getInterleavedBlockCount();
-  int32_t getDataLengthForInterleavedBlock(int32_t index);
 };
 
 #endif  // XFA_FXBARCODE_DATAMATRIX_BC_DATAMATRIXSYMBOLINFO144_H_