Unify CFWL_WidgetProperties and CFWL_WidgetImpProperties.

xfa/fwl/core/ifwl_formproxy.cpp

Index: xfa/fwl/core/ifwl_formproxy.cpp
diff --git a/xfa/fwl/core/ifwl_formproxy.cpp b/xfa/fwl/core/ifwl_formproxy.cpp
index d06cf0b7a66f5c31dfa5f2437eb93b496cd0ae2e..8bb10913267b07e4b2d7a2ada54ff59763bf9f86 100644
--- a/xfa/fwl/core/ifwl_formproxy.cpp
+++ b/xfa/fwl/core/ifwl_formproxy.cpp
@@ -9,11 +9,11 @@
 #include "third_party/base/ptr_util.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
 
-IFWL_FormProxy::IFWL_FormProxy(const IFWL_App* app,
-                               const CFWL_WidgetImpProperties& properties,
-                               IFWL_Widget* pOuter)
-    : IFWL_Form(app, properties, pOuter) {
-}
+IFWL_FormProxy::IFWL_FormProxy(
+    const IFWL_App* app,
+    std::unique_ptr<CFWL_WidgetProperties> properties,
+    IFWL_Widget* pOuter)
+    : IFWL_Form(app, std::move(properties), pOuter) {}
 
 IFWL_FormProxy::~IFWL_FormProxy() {}