Unify CFWL_WidgetProperties and CFWL_WidgetImpProperties.

xfa/fwl/core/ifwl_formproxy.h

Index: xfa/fwl/core/ifwl_formproxy.h
diff --git a/xfa/fwl/core/ifwl_formproxy.h b/xfa/fwl/core/ifwl_formproxy.h
index 7bab976307086abe6968af91057a4e579e5c2c4a..4eaeb5ab2f7e25a49a5bfdeb83a5162cb833a7b2 100644
--- a/xfa/fwl/core/ifwl_formproxy.h
+++ b/xfa/fwl/core/ifwl_formproxy.h
@@ -9,12 +9,12 @@
 
 #include "xfa/fwl/core/ifwl_form.h"
 
-class CFWL_WidgetImpProperties;
+class CFWL_WidgetProperties;
 
 class IFWL_FormProxy : public IFWL_Form {
  public:
   IFWL_FormProxy(const IFWL_App* app,
-                 const CFWL_WidgetImpProperties& properties,
+                 std::unique_ptr<CFWL_WidgetProperties> properties,
                  IFWL_Widget* pOuter);
   ~IFWL_FormProxy() override;