Cleanup IFWL_Widget visibility and virtual parameters

xfa/fwl/core/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_CORE_CFWL_COMBOBOX_H_
 #define XFA_FWL_CORE_CFWL_COMBOBOX_H_
 
 #include <memory>
@@ skipping 10 matching lines @@
   void Initialize();
 
   int32_t AddString(const CFX_WideStringC& wsText);
   int32_t AddString(const CFX_WideStringC& wsText, CFX_DIBitmap* pIcon);
   bool RemoveAt(int32_t iIndex);  // Returns false iff |iIndex| out of range.
   void RemoveAll();
   int32_t CountItems();
   FWL_Error GetTextByIndex(int32_t iIndex, CFX_WideString& wsText);
   int32_t GetCurSel();
   FWL_Error SetCurSel(int32_t iSel);
-  FWL_Error SetEditText(const CFX_WideString& wsText);
+  void 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);
   bool EditRedo(const IFDE_TxtEdtDoRecord* pRecord);
   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);
+  void SetListTheme(IFWL_ThemeProvider* pTheme);
   bool AfterFocusShowDropList();
   FWL_Error OpenDropDownList(bool bActivate);
 
   bool EditCanUndo();
   bool EditCanRedo();
   bool EditUndo();
   bool EditRedo();
   bool EditCanCopy();
   bool EditCanCut();
   bool EditCanSelectAll();
   bool EditCopy(CFX_WideString& wsCopy);
   bool EditCut(CFX_WideString& wsCut);
   bool EditPaste(const CFX_WideString& wsPaste);
   bool EditSelectAll();
   bool EditDelete();
   bool EditDeSelect();
   FWL_Error GetBBox(CFX_RectF& rect);
-  FWL_Error EditModifyStylesEx(uint32_t dwStylesExAdded,
-                               uint32_t dwStylesExRemoved);
+  void EditModifyStylesEx(uint32_t dwStylesExAdded, uint32_t dwStylesExRemoved);
 
   // IFWL_DataProvider
   FWL_Error GetCaption(IFWL_Widget* pWidget,
                        CFX_WideString& wsCaption) override;
 
   // IFWL_ListBoxDP
   int32_t CountItems(const IFWL_Widget* pWidget) override;
   CFWL_ListItem* GetItem(const IFWL_Widget* pWidget, int32_t nIndex) override;
   int32_t GetItemIndex(IFWL_Widget* pWidget, CFWL_ListItem* pItem) override;
   bool SetItemIndex(IFWL_Widget* pWidget,
@@ skipping 35 matching lines @@
   // IFWL_ComboBoxDP
   FX_FLOAT GetListHeight(IFWL_Widget* pWidget) override;
 
  private:
   std::vector<std::unique_ptr<CFWL_ListItem>> m_ItemArray;
   FX_FLOAT m_fMaxListHeight;
   FX_FLOAT m_fItemHeight;
 };
 
 #endif  // XFA_FWL_CORE_CFWL_COMBOBOX_H_