Return bool rather than bitwise-and for FX_BOOL

xfa/fwl/core/fwl_formimp.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 XFA_FWL_CORE_FWL_FORMIMP_H_
 #define XFA_FWL_CORE_FWL_FORMIMP_H_
 
 #include "xfa/fwl/core/fwl_widgetimp.h"
@@ skipping 14 matching lines @@
 #define FWL_SYSBUTTONSTATE_Pressed 0x0002
 #define FWL_SYSBUTTONSTATE_Disabled 0x0010
 
 class CFWL_SysBtn {
  public:
   CFWL_SysBtn() {
     m_rtBtn.Set(0, 0, 0, 0);
     m_dwState = 0;
   }
 
-  FX_BOOL IsDisabled() { return m_dwState & FWL_SYSBUTTONSTATE_Disabled; }
+  bool IsDisabled() { return !!(m_dwState & FWL_SYSBUTTONSTATE_Disabled); }
 
   void SetNormal() { m_dwState &= 0xFFF0; }
   void SetPressed() {
     SetNormal();
     m_dwState |= FWL_SYSBUTTONSTATE_Pressed;
   }
   void SetHover() {
     SetNormal();
     m_dwState |= FWL_SYSBUTTONSTATE_Hover;
   }
@@ skipping 133 matching lines @@
   void OnMouseMove(CFWL_MsgMouse* pMsg);
   void OnMouseHover(CFWL_MsgMouse* pMsg);
   void OnMouseLeave(CFWL_MsgMouse* pMsg);
   void OnLButtonDblClk(CFWL_MsgMouse* pMsg);
   void OnWindowMove(CFWL_MsgWindowMove* pMsg);
   void OnClose(CFWL_MsgClose* pMsg);
   CFWL_FormImp* m_pOwner;
 };
 
 #endif  // XFA_FWL_CORE_FWL_FORMIMP_H_