Stop converting widestring -> c_str -> widestring in several places.

fpdfsdk/fxedit/include/fxet_list.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 FPDFSDK_FXEDIT_INCLUDE_FXET_LIST_H_
 #define FPDFSDK_FXEDIT_INCLUDE_FXET_LIST_H_
 
 #include "core/fxcrt/include/fx_coordinates.h"
@@ skipping 87 matching lines @@
 class CFX_ListItem final {
  public:
   CFX_ListItem();
   ~CFX_ListItem();
 
   void SetFontMap(IPVT_FontMap* pFontMap);
   CFX_Edit* GetEdit() const;
 
   void SetRect(const CLST_Rect& rect);
   void SetSelect(FX_BOOL bSelected);
-  void SetText(const FX_WCHAR* text);
+  void SetText(const CFX_WideString& text);
   void SetFontSize(FX_FLOAT fFontSize);
   CFX_WideString GetText() const;
 
   CLST_Rect GetRect() const;
   FX_BOOL IsSelected() const;
   FX_FLOAT GetItemHeight() const;
   uint16_t GetFirstChar() const;
 
  private:
   CFX_Edit_Iterator* GetIterator() const;
@@ skipping 117 matching lines @@
   FX_BOOL OnChar(uint16_t nChar, FX_BOOL bShift, FX_BOOL bCtrl);
 
   void SetScrollPos(const CFX_FloatPoint& point);
   void ScrollToListItem(int32_t nItemIndex);
   CFX_FloatRect GetItemRect(int32_t nIndex) const;
   int32_t GetCaret() const;
   int32_t GetSelect() const;
   int32_t GetTopItem() const;
   CFX_FloatRect GetContentRect() const;
   int32_t GetItemIndex(const CFX_FloatPoint& point) const;
-  void AddString(const FX_WCHAR* str);
+  void AddString(const CFX_WideString& str);
   void SetTopItem(int32_t nIndex);
   void Select(int32_t nItemIndex);
   void SetCaret(int32_t nItemIndex);
   void Empty();
   void Cancel();
   CFX_WideString GetText() const;
 
   void SetFontMap(IPVT_FontMap* pFontMap);
   void SetFontSize(FX_FLOAT fFontSize);
   CFX_FloatRect GetPlateRect() const;
@@ skipping 17 matching lines @@
   void ReArrange(int32_t nItemIndex);
   CFX_FloatRect GetItemRectInternal(int32_t nIndex) const;
   CFX_FloatRect GetContentRectInternal() const;
   void SetMultipleSelect(int32_t nItemIndex, FX_BOOL bSelected);
   void SetSingleSelect(int32_t nItemIndex);
   void InvalidateItem(int32_t nItemIndex);
   void SelectItems();
   FX_BOOL IsItemVisible(int32_t nItemIndex) const;
   void SetScrollInfo();
   void SetScrollPosY(FX_FLOAT fy);
-  void AddItem(const FX_WCHAR* str);
+  void AddItem(const CFX_WideString& str);
   CFX_WideString GetItemText(int32_t nIndex) const;
   void SetItemSelect(int32_t nItemIndex, FX_BOOL bSelected);
   int32_t GetLastSelected() const;
   FX_WCHAR Toupper(FX_WCHAR c) const;
 
   CPWL_List_Notify* m_pNotify;
   FX_BOOL m_bNotifyFlag;
   CFX_FloatPoint m_ptScrollPos;
   CPLST_Select m_aSelItems;  // for multiple
   int32_t m_nSelItem;        // for single
   int32_t m_nFootIndex;      // for multiple
   FX_BOOL m_bCtrlSel;        // for multiple
   int32_t m_nCaretIndex;     // for multiple
   CLST_ArrayTemplate<CFX_ListItem*> m_aListItems;
   FX_FLOAT m_fFontSize;
   IPVT_FontMap* m_pFontMap;
   FX_BOOL m_bMultiple;
 };
 
 #endif  // FPDFSDK_FXEDIT_INCLUDE_FXET_LIST_H_