Pass objects instead of strings for undo/redo records.

xfa/fwl/lightwidget/cfwl_combobox.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_LIGHTWIDGET_CFWL_COMBOBOX_H_
 #define XFA_FWL_LIGHTWIDGET_CFWL_COMBOBOX_H_
 
 #include <memory>
@@ skipping 22 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);
   FWL_Error SetMaxListHeight(FX_FLOAT fMaxHeight);
   FWL_Error SetItemData(int32_t iIndex, void* pData);
   void* GetItemData(int32_t iIndex);
   FWL_Error SetListTheme(IFWL_ThemeProvider* pTheme);
   FX_BOOL AfterFocusShowDropList();
   FWL_Error OpenDropDownList(FX_BOOL bActivate);
 
   FX_BOOL EditCanUndo();
   FX_BOOL EditCanRedo();
   FX_BOOL EditUndo();
@@ skipping 79 matching lines @@
   CFX_RectF m_rtItem;
   uint32_t m_dwStyles;
   CFX_WideString m_wsText;
   CFX_DIBitmap* m_pDIB;
   uint32_t m_dwCheckState;
   CFX_RectF m_rtCheckBox;
   void* m_pData;
 };
 
 #endif  // XFA_FWL_LIGHTWIDGET_CFWL_COMBOBOX_H_