Use some FXSYS methods instead of duplicating

xfa/fxfa/parser/xfa_utils.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_FXFA_PARSER_XFA_UTILS_H_
 #define XFA_FXFA_PARSER_XFA_UTILS_H_
 
 #include "xfa/fde/xml/fde_xml.h"
 #include "xfa/fgas/crt/fgas_stream.h"
 #include "xfa/fgas/crt/fgas_utils.h"
 #include "xfa/fxfa/include/fxfa_basic.h"
 
 class CFDE_XMLElement;
 class CFDE_XMLNode;
 class CXFA_LocaleValue;
 class CXFA_Node;
 class CXFA_WidgetData;
 
-inline FX_BOOL XFA_IsSpace(FX_WCHAR c) {
-  return (c == 0x20) || (c == 0x0d) || (c == 0x0a) || (c == 0x09);
-}
-inline FX_BOOL XFA_IsDigit(FX_WCHAR c) {
-  return c >= '0' && c <= '9';
-}
-
 FX_BOOL XFA_FDEExtension_ResolveNamespaceQualifier(
     CFDE_XMLElement* pNode,
     const CFX_WideStringC& wsQualifier,
     CFX_WideString& wsNamespaceURI);
+
 template <class NodeType, class TraverseStrategy>
 class CXFA_NodeIteratorTemplate {
  public:
   CXFA_NodeIteratorTemplate(NodeType* pRootNode = nullptr)
       : m_pRoot(pRootNode) {
     if (pRootNode) {
       m_NodeStack.Push(pRootNode);
     }
   }
   FX_BOOL Init(NodeType* pRootNode) {
@@ skipping 140 matching lines @@
 FX_BOOL XFA_IsLayoutElement(XFA_Element eElement,
                             FX_BOOL bLayoutContainer = FALSE);
 
 void XFA_DataExporter_DealWithDataGroupNode(CXFA_Node* pDataNode);
 void XFA_DataExporter_RegenerateFormFile(CXFA_Node* pNode,
                                          IFX_Stream* pStream,
                                          const FX_CHAR* pChecksum = nullptr,
                                          FX_BOOL bSaveXML = FALSE);
 
 #endif  // XFA_FXFA_PARSER_XFA_UTILS_H_