Remove FX_BOOL from core

core/fpdfdoc/cpdf_aaction.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 CORE_FPDFDOC_CPDF_AACTION_H_
 #define CORE_FPDFDOC_CPDF_AACTION_H_
 
 #include "core/fpdfdoc/cpdf_action.h"
@@ skipping 22 matching lines @@
     CloseDocument,
     SaveDocument,
     DocumentSaved,
     PrintDocument,
     DocumentPrinted
   };
 
   CPDF_AAction() : m_pDict(nullptr) {}
   explicit CPDF_AAction(CPDF_Dictionary* pDict) : m_pDict(pDict) {}
 
-  FX_BOOL ActionExist(AActionType eType) const;
+  bool ActionExist(AActionType eType) const;
   CPDF_Action GetAction(AActionType eType) const;
   CPDF_Dictionary* GetDict() const { return m_pDict; }
 
  private:
   CPDF_Dictionary* const m_pDict;
 };
 
 #endif  // CORE_FPDFDOC_CPDF_AACTION_H_