Cleanup IFWL_Adapter interfaces.

xfa/fwl/basewidget/fwl_comboboximp.cpp

 // 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
 
 #include "xfa/fwl/basewidget/fwl_comboboximp.h"
 
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fee/fde_txtedtengine.h"
@@ skipping 704 matching lines @@
       FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, iSel);
       static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
           ->GetItemText(hItem, wsText);
       m_pEdit->SetText(wsText);
     }
     m_pEdit->Update();
   }
   m_iCurSel = bClearSel ? -1 : iSel;
   return FWL_ERR_Succeeded;
 }
-FWL_ERR CFWL_ComboBoxImp::SetStates(uint32_t dwStates, FX_BOOL bSet) {
+
+void CFWL_ComboBoxImp::SetStates(uint32_t dwStates, FX_BOOL bSet) {
   FX_BOOL bIsDropDown = IsDropDownStyle();
-  if (bIsDropDown && m_pEdit) {
+  if (bIsDropDown && m_pEdit)
     m_pEdit->SetStates(dwStates, bSet);
-  }
-  if (m_pListBox) {
+  if (m_pListBox)
     m_pListBox->SetStates(dwStates, bSet);
-  }
-  return CFWL_WidgetImp::SetStates(dwStates, bSet);
+  CFWL_WidgetImp::SetStates(dwStates, bSet);
 }
+
 FWL_ERR CFWL_ComboBoxImp::SetEditText(const CFX_WideString& wsText) {
   if (!m_pEdit)
     return FWL_ERR_Indefinite;
   m_pEdit->SetText(wsText);
   return m_pEdit->Update();
 }
 int32_t CFWL_ComboBoxImp::GetEditTextLength() const {
   if (!m_pEdit)
     return -1;
   return m_pEdit->GetTextLength();
@@ skipping 1098 matching lines @@
   m_pComboBox->ShowDropList(FALSE);
 }
 void CFWL_ComboProxyImpDelegate::OnFocusChanged(CFWL_MsgKillFocus* pMsg,
                                                 FX_BOOL bSet) {
   if (!bSet) {
     if (pMsg->m_pSetFocus == NULL) {
       m_pComboBox->ShowDropList(FALSE);
     }
   }
 }