Remove FX_BOOL from xfa.

xfa/fxfa/parser/cxfa_measurement.h

 // Copyright 2016 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 XFA_FXFA_PARSER_CXFA_MEASUREMENT_H_
 #define XFA_FXFA_PARSER_CXFA_MEASUREMENT_H_
 
 #include "core/fxcrt/fx_string.h"
 #include "core/fxcrt/fx_system.h"
 #include "xfa/fxfa/fxfa_basic.h"
 
 class CXFA_Measurement {
  public:
   explicit CXFA_Measurement(const CFX_WideStringC& wsMeasure);
   CXFA_Measurement();
   CXFA_Measurement(FX_FLOAT fValue, XFA_UNIT eUnit);
 
   void Set(const CFX_WideStringC& wsMeasure);
   void Set(FX_FLOAT fValue, XFA_UNIT eUnit) {
     m_fValue = fValue;
     m_eUnit = eUnit;
   }
 
   XFA_UNIT GetUnit(const CFX_WideStringC& wsUnit);
   XFA_UNIT GetUnit() const { return m_eUnit; }
   FX_FLOAT GetValue() const { return m_fValue; }
 
-  FX_BOOL ToString(CFX_WideString& wsMeasure) const;
-  FX_BOOL ToUnit(XFA_UNIT eUnit, FX_FLOAT& fValue) const;
+  bool ToString(CFX_WideString& wsMeasure) const;
+  bool ToUnit(XFA_UNIT eUnit, FX_FLOAT& fValue) const;
   FX_FLOAT ToUnit(XFA_UNIT eUnit) const {
     FX_FLOAT f;
     return ToUnit(eUnit, f) ? f : 0;
   }
 
  private:
   FX_FLOAT m_fValue;
   XFA_UNIT m_eUnit;
 };
 
 #endif  // XFA_FXFA_PARSER_CXFA_MEASUREMENT_H_