Remove DataProvider from CFWL_WidgetProperties

xfa/fwl/core/cfwl_combobox.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/core/cfwl_combobox.h"
 
 #include <utility>
 
@@ skipping 11 matching lines @@
 }  // namespace
 
 CFWL_ComboBox::CFWL_ComboBox(const CFWL_App* app) : CFWL_Widget(app) {}
 
 CFWL_ComboBox::~CFWL_ComboBox() {}
 
 void CFWL_ComboBox::Initialize() {
   ASSERT(!m_pIface);
 
   m_pIface = pdfium::MakeUnique<IFWL_ComboBox>(
-      m_pApp, pdfium::MakeUnique<CFWL_WidgetProperties>(this));
+      m_pApp, pdfium::MakeUnique<CFWL_WidgetProperties>());
 
   CFWL_Widget::Initialize();
 }
 
 void CFWL_ComboBox::AddString(const CFX_WideStringC& wsText) {
   if (GetWidget())
     ToComboBox(GetWidget())->AddString(wsText);
 }
 
 bool CFWL_ComboBox::RemoveAt(int32_t iIndex) {
@@ skipping 97 matching lines @@
     ToComboBox(GetWidget())->GetBBox(rect);
 }
 
 void CFWL_ComboBox::EditModifyStylesEx(uint32_t dwStylesExAdded,
                                        uint32_t dwStylesExRemoved) {
   if (GetWidget()) {
     ToComboBox(GetWidget())
         ->EditModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
   }
 }