Remove DataProvider from CFWL_WidgetProperties

xfa/fwl/core/cfwl_checkbox.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_checkbox.h"
 
 #include <memory>
+#include <utility>
 
 #include "third_party/base/ptr_util.h"
 #include "xfa/fwl/core/fwl_error.h"
 
 CFWL_CheckBox::CFWL_CheckBox(const CFWL_App* app)
     : CFWL_Widget(app), m_fBoxHeight(16.0f) {}
 
 CFWL_CheckBox::~CFWL_CheckBox() {}
 
 void CFWL_CheckBox::Initialize() {
   ASSERT(!m_pIface);
 
-  m_pIface = pdfium::MakeUnique<IFWL_CheckBox>(
-      m_pApp, pdfium::MakeUnique<CFWL_WidgetProperties>(this));
+  auto iface = pdfium::MakeUnique<IFWL_CheckBox>(
+      m_pApp, pdfium::MakeUnique<CFWL_WidgetProperties>());
+  iface->SetDataProvider(this);
+  m_pIface = std::move(iface);
 
   CFWL_Widget::Initialize();
 }
 
 void CFWL_CheckBox::SetBoxSize(FX_FLOAT fHeight) {
   m_fBoxHeight = fHeight;
 }
 
 FX_FLOAT CFWL_CheckBox::GetBoxSize(IFWL_Widget* pWidget) {
   return m_fBoxHeight;
 }