FX_BOOL considered harmful.

core/src/fxcrt/fx_arabic.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef CORE_SRC_FXCRT_FX_ARABIC_H_
 #define CORE_SRC_FXCRT_FX_ARABIC_H_
 
 #include "../../include/fxcrt/fx_arb.h"
 
 class CFX_BidiChar final : public IFX_BidiChar
 {
 public:
     CFX_BidiChar();
     ~CFX_BidiChar() override {}
 
-    void SetPolicy(FX_BOOL bSeparateNeutral = TRUE) override;
-    FX_BOOL AppendChar(FX_WCHAR wch) override;
-    FX_BOOL EndChar() override;
+    void SetPolicy(bool bSeparateNeutral = true) override;
+    bool AppendChar(FX_WCHAR wch) override;
+    bool EndChar() override;
     int32_t GetBidiInfo(int32_t &iStart, int32_t &iCount) override;
     void Reset() override;
 
 private:
-    FX_BOOL     m_bSeparateNeutral;
+    bool        m_bSeparateNeutral;
     int32_t     m_iCurStart;
     int32_t     m_iCurCount;
     int32_t     m_iCurBidi;
     int32_t     m_iLastBidi;
     int32_t     m_iLastStart;
     int32_t     m_iLastCount;
 };
 
 #endif  // CORE_SRC_FXCRT_FX_ARABIC_H_