Remove IFWL_*::Create methods, use new

xfa/fwl/lightwidget/cfwl_picturebox.cpp

Index: xfa/fwl/lightwidget/cfwl_picturebox.cpp
diff --git a/xfa/fwl/lightwidget/cfwl_picturebox.cpp b/xfa/fwl/lightwidget/cfwl_picturebox.cpp
index e6328e72ff088ada08795be09c506806e4ba64df..5249f2633b6f1369f9071511c6781150733284b5 100644
--- a/xfa/fwl/lightwidget/cfwl_picturebox.cpp
+++ b/xfa/fwl/lightwidget/cfwl_picturebox.cpp
@@ -8,6 +8,8 @@
 
 #include <memory>
 
+#include "third_party/base/ptr_util.h"
+
 IFWL_PictureBox* CFWL_PictureBox::GetWidget() {
   return static_cast<IFWL_PictureBox*>(m_pIface.get());
 }
@@ -23,8 +25,9 @@ FWL_Error CFWL_PictureBox::Initialize(
   if (pProperties) {
     *m_pProperties = *pProperties;
   }
-  std::unique_ptr<IFWL_PictureBox> pPictureBox(IFWL_PictureBox::Create(
-      m_pProperties->MakeWidgetImpProperties(&m_PictureBoxDP), nullptr));
+  std::unique_ptr<IFWL_PictureBox> pPictureBox =
+      pdfium::MakeUnique<IFWL_PictureBox>(
+          m_pProperties->MakeWidgetImpProperties(&m_PictureBoxDP));
   FWL_Error ret = pPictureBox->Initialize();
   if (ret != FWL_Error::Succeeded) {
     return ret;