Continue IFWL cleanup

xfa/fwl/core/cfwl_listbox.h

Index: xfa/fwl/core/cfwl_listbox.h
diff --git a/xfa/fwl/core/cfwl_listbox.h b/xfa/fwl/core/cfwl_listbox.h
index e28f8df7bbf261199a8fae02bdf8b388ba983a9b..ff24e5a30832012ea2ed8930bd300dbfbe5dd041 100644
--- a/xfa/fwl/core/cfwl_listbox.h
+++ b/xfa/fwl/core/cfwl_listbox.h
@@ -29,9 +29,9 @@ class CFWL_ListBox : public CFWL_Widget, public IFWL_ListBoxDP {
   int32_t CountSelItems();
   CFWL_ListItem* GetSelItem(int32_t nIndexSel);
   int32_t GetSelIndex(int32_t nIndex);
-  FWL_Error SetSelItem(CFWL_ListItem* pItem, bool bSelect = true);
-  FWL_Error GetItemText(CFWL_ListItem* pItem, CFX_WideString& wsText);
-  FWL_Error GetScrollPos(FX_FLOAT& fPos, bool bVert = true);
+  void SetSelItem(CFWL_ListItem* pItem, bool bSelect = true);
+  void GetItemText(CFWL_ListItem* pItem, CFX_WideString& wsText);
+  void GetScrollPos(FX_FLOAT& fPos, bool bVert = true);
   FWL_Error SetItemHeight(FX_FLOAT fItemHeight);
   CFWL_ListItem* GetFocusItem();
   FWL_Error SetFocusItem(CFWL_ListItem* pItem);
@@ -56,36 +56,36 @@ class CFWL_ListBox : public CFWL_Widget, public IFWL_ListBoxDP {
                     CFWL_ListItem* pItem,
                     int32_t nIndex) override;
   uint32_t GetItemStyles(IFWL_Widget* pWidget, CFWL_ListItem* pItem) override;
-  FWL_Error GetItemText(IFWL_Widget* pWidget,
-                        CFWL_ListItem* pItem,
-                        CFX_WideString& wsText) override;
-  FWL_Error GetItemRect(IFWL_Widget* pWidget,
-                        CFWL_ListItem* pItem,
-                        CFX_RectF& rtItem) override;
+  void GetItemText(IFWL_Widget* pWidget,
+                   CFWL_ListItem* pItem,
+                   CFX_WideString& wsText) override;
+  void GetItemRect(IFWL_Widget* pWidget,
+                   CFWL_ListItem* pItem,
+                   CFX_RectF& rtItem) override;
   void* GetItemData(IFWL_Widget* pWidget, CFWL_ListItem* pItem) override;
-  FWL_Error SetItemStyles(IFWL_Widget* pWidget,
-                          CFWL_ListItem* pItem,
-                          uint32_t dwStyle) override;
-  FWL_Error SetItemText(IFWL_Widget* pWidget,
-                        CFWL_ListItem* pItem,
-                        const FX_WCHAR* pszText) override;
-  FWL_Error SetItemRect(IFWL_Widget* pWidget,
-                        CFWL_ListItem* pItem,
-                        const CFX_RectF& rtItem) override;
+  void SetItemStyles(IFWL_Widget* pWidget,
+                     CFWL_ListItem* pItem,
+                     uint32_t dwStyle) override;
+  void SetItemText(IFWL_Widget* pWidget,
+                   CFWL_ListItem* pItem,
+                   const FX_WCHAR* pszText) override;
+  void SetItemRect(IFWL_Widget* pWidget,
+                   CFWL_ListItem* pItem,
+                   const CFX_RectF& rtItem) override;
   FX_FLOAT GetItemHeight(IFWL_Widget* pWidget) override;
   CFX_DIBitmap* GetItemIcon(IFWL_Widget* pWidget,
                             CFWL_ListItem* pItem) override;
-  FWL_Error GetItemCheckRect(IFWL_Widget* pWidget,
-                             CFWL_ListItem* pItem,
-                             CFX_RectF& rtCheck) override;
-  FWL_Error SetItemCheckRect(IFWL_Widget* pWidget,
-                             CFWL_ListItem* pItem,
-                             const CFX_RectF& rtCheck) override;
+  void GetItemCheckRect(IFWL_Widget* pWidget,
+                        CFWL_ListItem* pItem,
+                        CFX_RectF& rtCheck) override;
+  void SetItemCheckRect(IFWL_Widget* pWidget,
+                        CFWL_ListItem* pItem,
+                        const CFX_RectF& rtCheck) override;
   uint32_t GetItemCheckState(IFWL_Widget* pWidget,
                              CFWL_ListItem* pItem) override;
-  FWL_Error SetItemCheckState(IFWL_Widget* pWidget,
-                              CFWL_ListItem* pItem,
-                              uint32_t dwCheckState) override;
+  void SetItemCheckState(IFWL_Widget* pWidget,
+                         CFWL_ListItem* pItem,
+                         uint32_t dwCheckState) override;
 
  private:
   std::vector<std::unique_ptr<CFWL_ListItem>> m_ItemArray;