Unify CFWL_WidgetProperties and CFWL_WidgetImpProperties.

xfa/fwl/core/cfwl_edit.cpp

Index: xfa/fwl/core/cfwl_edit.cpp
diff --git a/xfa/fwl/core/cfwl_edit.cpp b/xfa/fwl/core/cfwl_edit.cpp
index 3d19e57f29f1ae7268b0c37f7d05e93fedc65bab..579442b369ef6925d9f87d38613a0e8d6cc31ef5 100644
--- a/xfa/fwl/core/cfwl_edit.cpp
+++ b/xfa/fwl/core/cfwl_edit.cpp
@@ -31,7 +31,7 @@ void CFWL_Edit::Initialize() {
   ASSERT(!m_pIface);
 
   m_pIface = pdfium::MakeUnique<IFWL_Edit>(
-      m_pApp, m_pProperties->MakeWidgetImpProperties(nullptr), nullptr);
+      m_pApp, pdfium::MakeUnique<CFWL_WidgetProperties>(), nullptr);
 
   CFWL_Widget::Initialize();
 }