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, 3 insertions, 2 deletions

diff --git a/xfa/fxbarcode/common/BC_CommonBitArray.h b/xfa/fxbarcode/common/BC_CommonBitArray.h
index 1c89500138..04cb96b752 100644
--- a/xfa/fxbarcode/common/BC_CommonBitArray.h
+++ b/xfa/fxbarcode/common/BC_CommonBitArray.h
@@ -11,10 +11,11 @@
 
 class CBC_CommonBitArray {
  public:
-  CBC_CommonBitArray(CBC_CommonBitArray* array);
-  CBC_CommonBitArray(int32_t size);
+  explicit CBC_CommonBitArray(CBC_CommonBitArray* array);
+  explicit CBC_CommonBitArray(int32_t size);
   CBC_CommonBitArray();
   virtual ~CBC_CommonBitArray();
+
   int32_t GetSize();
   CFX_Int32Array& GetBits();
   int32_t GetSizeInBytes();