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, 9 insertions, 6 deletions

diff --git a/xfa/fxbarcode/oned/BC_OnedCode128Writer.h b/xfa/fxbarcode/oned/BC_OnedCode128Writer.h
index b2530642af..7338b56952 100644
--- a/xfa/fxbarcode/oned/BC_OnedCode128Writer.h
+++ b/xfa/fxbarcode/oned/BC_OnedCode128Writer.h
@@ -15,26 +15,29 @@ class CBC_OnedCode128Writer : public CBC_OneDimWriter {
  public:
   CBC_OnedCode128Writer();
   explicit CBC_OnedCode128Writer(BC_TYPE type);
-  virtual ~CBC_OnedCode128Writer();
+  ~CBC_OnedCode128Writer() override;
 
+  // CBC_OneDimWriter
   uint8_t* Encode(const CFX_ByteString& contents,
                   BCFORMAT format,
                   int32_t& outWidth,
                   int32_t& outHeight,
                   int32_t hints,
-                  int32_t& e);
+                  int32_t& e) override;
   uint8_t* Encode(const CFX_ByteString& contents,
                   BCFORMAT format,
                   int32_t& outWidth,
                   int32_t& outHeight,
-                  int32_t& e);
+                  int32_t& e) override;
   uint8_t* Encode(const CFX_ByteString& contents,
                   int32_t& outLength,
-                  int32_t& e);
+                  int32_t& e) override;
+
+  FX_BOOL CheckContentValidity(const CFX_WideStringC& contents) override;
+  CFX_WideString FilterContents(const CFX_WideStringC& contents) override;
 
-  FX_BOOL CheckContentValidity(const CFX_WideStringC& contents);
-  CFX_WideString FilterContents(const CFX_WideStringC& contents);
   FX_BOOL SetTextLocation(BC_TEXT_LOC location);
+
   BC_TYPE GetType();
 
  private: