Unify CFWL_WidgetProperties and CFWL_WidgetImpProperties.

xfa/fwl/core/ifwl_combolist.cpp

Index: xfa/fwl/core/ifwl_combolist.cpp
diff --git a/xfa/fwl/core/ifwl_combolist.cpp b/xfa/fwl/core/ifwl_combolist.cpp
index 452cdff1e03764c6efdd9f89e9fdbdec9e958c32..04fefc628a0b7cb44002ce325a97300dc6cf79db 100644
--- a/xfa/fwl/core/ifwl_combolist.cpp
+++ b/xfa/fwl/core/ifwl_combolist.cpp
@@ -10,10 +10,11 @@
 #include "xfa/fwl/core/ifwl_combobox.h"
 #include "xfa/fwl/core/ifwl_comboedit.h"
 
-IFWL_ComboList::IFWL_ComboList(const IFWL_App* app,
-                               const CFWL_WidgetImpProperties& properties,
-                               IFWL_Widget* pOuter)
-    : IFWL_ListBox(app, properties, pOuter), m_bNotifyOwner(true) {
+IFWL_ComboList::IFWL_ComboList(
+    const IFWL_App* app,
+    std::unique_ptr<CFWL_WidgetProperties> properties,
+    IFWL_Widget* pOuter)
+    : IFWL_ListBox(app, std::move(properties), pOuter), m_bNotifyOwner(true) {
   ASSERT(pOuter);
 }