Cleanup unneeded FWL theme code.

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/cfde_txtedtengine.h"
 #include "xfa/fde/tto/fde_textout.h"
@@ skipping 677 matching lines @@
     param.m_rtPart = m_rtBtn;
     pTheme->DrawBackground(&param);
   }
   return FWL_Error::Succeeded;
 }
 FWL_Error CFWL_ComboBoxImp::SetThemeProvider(
     IFWL_ThemeProvider* pThemeProvider) {
   if (!pThemeProvider)
     return FWL_Error::Indefinite;
   m_pProperties->m_pThemeProvider = pThemeProvider;
-  if (m_pListBox && pThemeProvider->IsValidWidget(m_pListBox.get())) {
+  if (m_pListBox)
     m_pListBox->SetThemeProvider(pThemeProvider);
-  }
-  if (m_pEdit && pThemeProvider->IsValidWidget(m_pEdit.get())) {
+  if (m_pEdit)
     m_pEdit->SetThemeProvider(pThemeProvider);
-  }
   return FWL_Error::Succeeded;
 }
 int32_t CFWL_ComboBoxImp::GetCurSel() {
   return m_iCurSel;
 }
 FWL_Error CFWL_ComboBoxImp::SetCurSel(int32_t iSel) {
   int32_t iCount =
       static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->CountItems();
   FX_BOOL bClearSel = iSel < 0 || iSel >= iCount;
   FX_BOOL bDropDown = IsDropDownStyle();
@@ skipping 321 matching lines @@
     }
     m_pEdit->Update();
   }
 }
 void CFWL_ComboBoxImp::ReSetTheme() {
   IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
   if (!pTheme) {
     pTheme = GetAvailableTheme();
     m_pProperties->m_pThemeProvider = pTheme;
   }
-  if (m_pListBox) {
-    if (!m_pListBox->GetThemeProvider() &&
-        pTheme->IsValidWidget(m_pListBox.get())) {
-      m_pListBox->SetThemeProvider(pTheme);
-    }
-  }
-  if (m_pEdit) {
-    if (!m_pEdit->GetThemeProvider() && pTheme->IsValidWidget(m_pEdit.get())) {
-      m_pEdit->SetThemeProvider(pTheme);
-    }
-  }
+  if (m_pListBox && !m_pListBox->GetThemeProvider())
+    m_pListBox->SetThemeProvider(pTheme);
+  if (m_pEdit && !m_pEdit->GetThemeProvider())
+    m_pEdit->SetThemeProvider(pTheme);
 }
 void CFWL_ComboBoxImp::ReSetEditAlignment() {
   if (!m_pEdit)
     return;
   uint32_t dwStylExes = m_pProperties->m_dwStyleExes;
   uint32_t dwAdd = 0;
   switch (dwStylExes & FWL_STYLEEXT_CMB_EditHAlignMask) {
     case FWL_STYLEEXT_CMB_EditHCenter: {
       dwAdd |= FWL_STYLEEXT_EDT_HCenter;
       break;
@@ skipping 784 matching lines @@
   m_pComboBox->ShowDropList(FALSE);
 }
 void CFWL_ComboProxyImpDelegate::OnFocusChanged(CFWL_MsgKillFocus* pMsg,
                                                 FX_BOOL bSet) {
   if (!bSet) {
     if (!pMsg->m_pSetFocus) {
       m_pComboBox->ShowDropList(FALSE);
     }
   }
 }