Remove IFWL_*::Create methods, use new

xfa/fwl/lightwidget/cfwl_listbox.cpp

Index: xfa/fwl/lightwidget/cfwl_listbox.cpp
diff --git a/xfa/fwl/lightwidget/cfwl_listbox.cpp b/xfa/fwl/lightwidget/cfwl_listbox.cpp
index a0fff486cd12e81c21f552ba7772d46831ba1505..0245941a5fee8eb3b15d5a81b2203df57b7faf08 100644
--- a/xfa/fwl/lightwidget/cfwl_listbox.cpp
+++ b/xfa/fwl/lightwidget/cfwl_listbox.cpp
@@ -8,6 +8,7 @@
 
 #include <memory>
 
+#include "third_party/base/ptr_util.h"
 #include "third_party/base/stl_util.h"
 
 IFWL_ListBox* CFWL_ListBox::GetWidget() {
@@ -24,8 +25,8 @@ FWL_Error CFWL_ListBox::Initialize(const CFWL_WidgetProperties* pProperties) {
   if (pProperties) {
     *m_pProperties = *pProperties;
   }
-  std::unique_ptr<IFWL_ListBox> pListBox(IFWL_ListBox::Create(
-      m_pProperties->MakeWidgetImpProperties(&m_ListBoxDP), nullptr));
+  std::unique_ptr<IFWL_ListBox> pListBox = pdfium::MakeUnique<IFWL_ListBox>(
+      m_pProperties->MakeWidgetImpProperties(&m_ListBoxDP), nullptr);
   FWL_Error ret = pListBox->Initialize();
   if (ret != FWL_Error::Succeeded) {
     return ret;