Pass objects instead of strings for undo/redo records.

xfa/fwl/basewidget/fwl_comboboximp.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_BASEWIDGET_FWL_COMBOBOXIMP_H_
 #define XFA_FWL_BASEWIDGET_FWL_COMBOBOXIMP_H_
 
 #include <memory>
@@ skipping 99 matching lines @@
   FWL_Error SetEditText(const CFX_WideString& wsText);
   int32_t GetEditTextLength() const;
   FWL_Error GetEditText(CFX_WideString& wsText,
                         int32_t nStart = 0,
                         int32_t nCount = -1) const;
   FWL_Error SetEditSelRange(int32_t nStart, int32_t nCount = -1);
   int32_t GetEditSelRange(int32_t nIndex, int32_t& nStart);
   int32_t GetEditLimit();
   FWL_Error SetEditLimit(int32_t nLimit);
   FWL_Error EditDoClipboard(int32_t iCmd);
-  FX_BOOL EditRedo(const CFX_ByteStringC& bsRecord);
-  FX_BOOL EditUndo(const CFX_ByteStringC& bsRecord);
+  FX_BOOL EditRedo(const IFDE_TxtEdtDoRecord* pRecord);
+  FX_BOOL EditUndo(const IFDE_TxtEdtDoRecord* pRecord);
   IFWL_ListBox* GetListBoxt();
   FX_BOOL AfterFocusShowDropList();
   FWL_Error OpenDropDownList(FX_BOOL bActivate);
   FX_BOOL EditCanUndo();
   FX_BOOL EditCanRedo();
   FX_BOOL EditUndo();
   FX_BOOL EditRedo();
   FX_BOOL EditCanCopy();
   FX_BOOL EditCanCut();
   FX_BOOL EditCanSelectAll();
@@ skipping 104 matching lines @@
   void OnDeactive(CFWL_MsgDeactivate* pMsg);
   void OnFocusChanged(CFWL_MsgKillFocus* pMsg, FX_BOOL bSet);
   FX_BOOL m_bLButtonDown;
   FX_BOOL m_bLButtonUpSelf;
   FX_FLOAT m_fStartPos;
   IFWL_Form* m_pForm;
   CFWL_ComboBoxImp* m_pComboBox;
 };
 
 #endif  // XFA_FWL_BASEWIDGET_FWL_COMBOBOXIMP_H_