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, 5 insertions, 3 deletions

diff --git a/xfa/fxbarcode/qrcode/BC_QRFinderPattern.h b/xfa/fxbarcode/qrcode/BC_QRFinderPattern.h
index 0dc2f3cfcb..f02a229121 100644
--- a/xfa/fxbarcode/qrcode/BC_QRFinderPattern.h
+++ b/xfa/fxbarcode/qrcode/BC_QRFinderPattern.h
@@ -16,11 +16,13 @@ class CBC_QRFinderPattern : public CBC_ResultPoint {
 
  public:
   CBC_QRFinderPattern(FX_FLOAT x, FX_FLOAT posY, FX_FLOAT estimatedModuleSize);
-  virtual ~CBC_QRFinderPattern();
+  ~CBC_QRFinderPattern() override;
+
+  // CBC_ResultPoint
+  FX_FLOAT GetX() override;
+  FX_FLOAT GetY() override;
 
   int32_t GetCount() const;
-  FX_FLOAT GetX();
-  FX_FLOAT GetY();
   FX_FLOAT GetEstimatedModuleSize();
   void IncrementCount();
   FX_BOOL AboutEquals(FX_FLOAT moduleSize, FX_FLOAT i, FX_FLOAT j);