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, 1 deletions

diff --git a/xfa/fxbarcode/common/BC_CommonBitSource.h b/xfa/fxbarcode/common/BC_CommonBitSource.h
index f33e077c68..7c6736cba3 100644
--- a/xfa/fxbarcode/common/BC_CommonBitSource.h
+++ b/xfa/fxbarcode/common/BC_CommonBitSource.h
@@ -13,7 +13,8 @@
 class CBC_CommonBitSource {
  public:
   CBC_CommonBitSource(CFX_ByteArray* bytes);
-  virtual ~CBC_CommonBitSource();
+  ~CBC_CommonBitSource();
+
   int32_t ReadBits(int32_t numBits, int32_t& e);
   int32_t Available();
   int32_t getByteOffset();