Remove DataProvider from CFWL_WidgetProperties

xfa/fwl/core/cfwl_combobox.cpp

Index: xfa/fwl/core/cfwl_combobox.cpp
diff --git a/xfa/fwl/core/cfwl_combobox.cpp b/xfa/fwl/core/cfwl_combobox.cpp
index 7eb04b51182ffebf230e38ff0148e955dfbda54c..532f49fdd2bf37dd293f61e7c462eed38d9fead2 100644
--- a/xfa/fwl/core/cfwl_combobox.cpp
+++ b/xfa/fwl/core/cfwl_combobox.cpp
@@ -29,7 +29,7 @@ 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();
 }