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_WhiteRectangleDetector.h b/xfa/fxbarcode/common/BC_WhiteRectangleDetector.h
index f3ac77a9c0..427d7b85ca 100644
--- a/xfa/fxbarcode/common/BC_WhiteRectangleDetector.h
+++ b/xfa/fxbarcode/common/BC_WhiteRectangleDetector.h
@@ -14,18 +14,19 @@ class CBC_ResultPoint;
 
 class CBC_WhiteRectangleDetector {
  public:
-  CBC_WhiteRectangleDetector(CBC_CommonBitMatrix* image);
+  explicit CBC_WhiteRectangleDetector(CBC_CommonBitMatrix* image);
   CBC_WhiteRectangleDetector(CBC_CommonBitMatrix* image,
                              int32_t initSize,
                              int32_t x,
                              int32_t y);
   virtual ~CBC_WhiteRectangleDetector();
+
   virtual void Init(int32_t& e);
 
   CFX_ArrayTemplate<CBC_ResultPoint*>* Detect(int32_t& e);
 
  private:
-  int32_t Round(float d);
+  int32_t Round(FX_FLOAT d);
   CBC_ResultPoint* GetBlackPointOnSegment(FX_FLOAT aX,
                                           FX_FLOAT aY,
                                           FX_FLOAT bX,