Remove FX_BOOL from xfa.

xfa/fxfa/parser/cxfa_attachnodelist.cpp

 // 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
 
 #include "xfa/fxfa/parser/xfa_object.h"
 
 CXFA_AttachNodeList::CXFA_AttachNodeList(CXFA_Document* pDocument,
                                          CXFA_Node* pAttachNode)
     : CXFA_NodeList(pDocument) {
   m_pAttachNode = pAttachNode;
 }
 
 int32_t CXFA_AttachNodeList::GetLength() {
   return m_pAttachNode->CountChildren(
       XFA_Element::Unknown,
       m_pAttachNode->GetElementType() == XFA_Element::Subform);
 }
 
-FX_BOOL CXFA_AttachNodeList::Append(CXFA_Node* pNode) {
+bool CXFA_AttachNodeList::Append(CXFA_Node* pNode) {
   CXFA_Node* pParent = pNode->GetNodeItem(XFA_NODEITEM_Parent);
   if (pParent) {
     pParent->RemoveChild(pNode);
   }
   return m_pAttachNode->InsertChild(pNode);
 }
 
-FX_BOOL CXFA_AttachNodeList::Insert(CXFA_Node* pNewNode,
-                                    CXFA_Node* pBeforeNode) {
+bool CXFA_AttachNodeList::Insert(CXFA_Node* pNewNode, CXFA_Node* pBeforeNode) {
   CXFA_Node* pParent = pNewNode->GetNodeItem(XFA_NODEITEM_Parent);
   if (pParent) {
     pParent->RemoveChild(pNewNode);
   }
   return m_pAttachNode->InsertChild(pNewNode, pBeforeNode);
 }
 
-FX_BOOL CXFA_AttachNodeList::Remove(CXFA_Node* pNode) {
+bool CXFA_AttachNodeList::Remove(CXFA_Node* pNode) {
   return m_pAttachNode->RemoveChild(pNode);
 }
 
 CXFA_Node* CXFA_AttachNodeList::Item(int32_t iIndex) {
   return m_pAttachNode->GetChild(
       iIndex, XFA_Element::Unknown,
       m_pAttachNode->GetElementType() == XFA_Element::Subform);
 }