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, 7 insertions, 3 deletions

diff --git a/xfa/fxbarcode/qrcode/BC_QRAlignmentPattern.h b/xfa/fxbarcode/qrcode/BC_QRAlignmentPattern.h
index 9a4e80c2b2..7006b72c9c 100644
--- a/xfa/fxbarcode/qrcode/BC_QRAlignmentPattern.h
+++ b/xfa/fxbarcode/qrcode/BC_QRAlignmentPattern.h
@@ -15,10 +15,14 @@ class CBC_QRAlignmentPattern : public CBC_ResultPoint {
   CBC_QRAlignmentPattern(FX_FLOAT posX,
                          FX_FLOAT posY,
                          FX_FLOAT estimateModuleSize);
-  virtual ~CBC_QRAlignmentPattern();
+  ~CBC_QRAlignmentPattern() override;
+
+  // CBC_ResultPoint
+  FX_FLOAT GetX() override;
+  FX_FLOAT GetY() override;
+
   FX_BOOL AboutEquals(FX_FLOAT moduleSize, FX_FLOAT i, FX_FLOAT j);
-  FX_FLOAT GetX();
-  FX_FLOAT GetY();
+
   CBC_QRAlignmentPattern* Clone();
 };