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, 1 insertions, 1 deletions

diff --git a/xfa/fxbarcode/cbc_ean13.h b/xfa/fxbarcode/cbc_ean13.h
index 93abab27ff..afe2cd9781 100644
--- a/xfa/fxbarcode/cbc_ean13.h
+++ b/xfa/fxbarcode/cbc_ean13.h
@@ -30,7 +30,7 @@ class CBC_EAN13 : public CBC_OneCode {
                        const CFX_Matrix* matrix,
                        int32_t& e) override;
   FX_BOOL RenderBitmap(CFX_DIBitmap*& pOutBitmap, int32_t& e) override;
-  BC_TYPE GetType() override { return BC_EAN13; }
+  BC_TYPE GetType() override;
 
  private:
   CFX_WideString Preprocess(const CFX_WideStringC& contents);