FX_BOOL considered harmful.

core/src/fxcrt/fxcrt_posix.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_FXCRT_POSIX_H_
 #define CORE_SRC_FXCRT_FXCRT_POSIX_H_
 
 #include "extension.h"
 
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_LINUX_ || _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ || _FXM_PLATFORM_ == _FXM_PLATFORM_ANDROID_
 class CFXCRT_FileAccess_Posix : public IFXCRT_FileAccess
 {
 public:
     CFXCRT_FileAccess_Posix();
     virtual ~CFXCRT_FileAccess_Posix();
-    virtual FX_BOOL             Open(const CFX_ByteStringC& fileName, FX_DWORD dwMode);
-    virtual FX_BOOL             Open(const CFX_WideStringC& fileName, FX_DWORD dwMode);
+    virtual bool                Open(const CFX_ByteStringC& fileName, FX_DWORD dwMode);
+    virtual bool                Open(const CFX_WideStringC& fileName, FX_DWORD dwMode);
     virtual void                Close();
     virtual void                Release();
     virtual FX_FILESIZE GetSize() const;
     virtual FX_FILESIZE GetPosition() const;
     virtual FX_FILESIZE SetPosition(FX_FILESIZE pos);
     virtual size_t              Read(void* pBuffer, size_t szBuffer);
     virtual size_t              Write(const void* pBuffer, size_t szBuffer);
     virtual size_t              ReadPos(void* pBuffer, size_t szBuffer, FX_FILESIZE pos);
     virtual size_t              WritePos(const void* pBuffer, size_t szBuffer, FX_FILESIZE pos);
-    virtual FX_BOOL             Flush();
-    virtual FX_BOOL             Truncate(FX_FILESIZE szFile);
+    virtual bool                Flush();
+    virtual bool                Truncate(FX_FILESIZE szFile);
 protected:
     int32_t     m_nFD;
 };
 #endif
 
 #endif  // CORE_SRC_FXCRT_FXCRT_POSIX_H_