Remove IFWL_*::Create methods, use new

xfa/fwl/lightwidget/cfwl_combobox.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/fwl/lightwidget/cfwl_combobox.h"
 
 #include <utility>
 
+#include "third_party/base/ptr_util.h"
 #include "xfa/fwl/core/fwl_error.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
 IFWL_ComboBox* CFWL_ComboBox::GetWidget() {
   return static_cast<IFWL_ComboBox*>(m_pIface.get());
 }
 
 const IFWL_ComboBox* CFWL_ComboBox::GetWidget() const {
   return static_cast<IFWL_ComboBox*>(m_pIface.get());
 }
 
 FWL_Error CFWL_ComboBox::Initialize(const CFWL_WidgetProperties* pProperties) {
   if (m_pIface)
     return FWL_Error::Indefinite;
   if (pProperties) {
     *m_pProperties = *pProperties;
   }
-  std::unique_ptr<IFWL_ComboBox> pComboBox(IFWL_ComboBox::Create(
-      m_pProperties->MakeWidgetImpProperties(&m_comboBoxData)));
+  std::unique_ptr<IFWL_ComboBox> pComboBox = pdfium::MakeUnique<IFWL_ComboBox>(
+      m_pProperties->MakeWidgetImpProperties(&m_comboBoxData));
   FWL_Error ret = pComboBox->Initialize();
   if (ret != FWL_Error::Succeeded) {
     return ret;
   }
   m_pIface = std::move(pComboBox);
   CFWL_Widget::Initialize();
   return FWL_Error::Succeeded;
 }
 
 int32_t CFWL_ComboBox::AddString(const CFX_WideStringC& wsText) {
@@ skipping 339 matching lines @@
   return FWL_Error::Succeeded;
 }
 
 FX_FLOAT CFWL_ComboBox::CFWL_ComboBoxDP::GetListHeight(IFWL_Widget* pWidget) {
   return m_fMaxListHeight;
 }
 
 CFWL_ComboBoxItem::CFWL_ComboBoxItem() : m_pDIB(nullptr), m_pData(nullptr) {}
 
 CFWL_ComboBoxItem::~CFWL_ComboBoxItem() {}