Pass objects instead of strings for undo/redo records.

xfa/fwl/lightwidget/cfwl_edit.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/lightwidget/cfwl_edit.h"
 
 #include <memory>
 #include <vector>
@@ skipping 136 matching lines @@
     return FWL_Error::Indefinite;
   return static_cast<IFWL_Edit*>(m_pIface)->Replace(nStart, nLen, wsReplace);
 }
 
 FWL_Error CFWL_Edit::DoClipboard(int32_t iCmd) {
   if (!m_pIface)
     return FWL_Error::Indefinite;
   return static_cast<IFWL_Edit*>(m_pIface)->DoClipboard(iCmd);
 }
 
-FX_BOOL CFWL_Edit::Redo(const CFX_ByteStringC& bsRecord) {
-  if (!m_pIface)
-    return FALSE;
-  return static_cast<IFWL_Edit*>(m_pIface)->Redo(bsRecord);
+FX_BOOL CFWL_Edit::Redo(const IFDE_TxtEdtDoRecord* pRecord) {
+  return m_pIface && static_cast<IFWL_Edit*>(m_pIface)->Redo(pRecord);
 }
 
-FX_BOOL CFWL_Edit::Undo(const CFX_ByteStringC& bsRecord) {
-  if (!m_pIface)
-    return FALSE;
-  return static_cast<IFWL_Edit*>(m_pIface)->Undo(bsRecord);
+FX_BOOL CFWL_Edit::Undo(const IFDE_TxtEdtDoRecord* pRecord) {
+  return m_pIface && static_cast<IFWL_Edit*>(m_pIface)->Undo(pRecord);
 }
 
 FWL_Error CFWL_Edit::SetTabWidth(FX_FLOAT fTabWidth, FX_BOOL bEquidistant) {
   if (!m_pIface)
     return FWL_Error::Indefinite;
   return static_cast<IFWL_Edit*>(m_pIface)
       ->SetTabWidth(fTabWidth, bEquidistant);
 }
 
 FWL_Error CFWL_Edit::SetNumberRange(int32_t iMin, int32_t iMax) {
@@ skipping 58 matching lines @@
 
 FX_BOOL CFWL_Edit::ReplaceSpellCheckWord(CFX_PointF pointf,
                                          const CFX_ByteStringC& bsReplace) {
   return static_cast<IFWL_Edit*>(m_pIface)
       ->ReplaceSpellCheckWord(pointf, bsReplace);
 }
 
 CFWL_Edit::CFWL_Edit() {}
 
 CFWL_Edit::~CFWL_Edit() {}