Remove FX_BOOL from xfa.

xfa/fwl/core/ifwl_datetimeedit.cpp

 // 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
 
 #include "xfa/fwl/core/ifwl_datetimeedit.h"
 
 #include "third_party/base/ptr_util.h"
 #include "xfa/fwl/core/cfwl_widgetmgr.h"
@@ skipping 26 matching lines @@
       if (pMouse->m_dwCmd == FWL_MouseCommand::LeftButtonDown ||
           pMouse->m_dwCmd == FWL_MouseCommand::RightButtonDown) {
         if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) == 0)
           m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
 
         IFWL_DateTimePicker* pDateTime =
             static_cast<IFWL_DateTimePicker*>(m_pOuter);
         if (pDateTime->IsMonthCalendarShowed()) {
           CFX_RectF rtInvalidate;
           pDateTime->GetWidgetRect(rtInvalidate);
-          pDateTime->ShowMonthCalendar(FALSE);
+          pDateTime->ShowMonthCalendar(false);
           rtInvalidate.Offset(-rtInvalidate.left, -rtInvalidate.top);
           pDateTime->Repaint(&rtInvalidate);
         }
       }
     }
   }
   IFWL_Edit::OnProcessMessage(pMessage);
 }