Fold IFWL*::{Initialize|Finalize} into constructor/destructor

xfa/fwl/core/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/core/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"
 
 namespace {
 
 IFWL_ComboBox* ToComboBox(IFWL_Widget* widget) {
   return static_cast<IFWL_ComboBox*>(widget);
 }
 
 const IFWL_ComboBox* ToComboBox(const IFWL_Widget* widget) {
   return static_cast<const IFWL_ComboBox*>(widget);
 }
 
 }  // namespace
 
 CFWL_ComboBox::CFWL_ComboBox(const IFWL_App* app) : CFWL_Widget(app) {}
 
 CFWL_ComboBox::~CFWL_ComboBox() {}
 
 void CFWL_ComboBox::Initialize() {
   ASSERT(!m_pIface);
 
-  std::unique_ptr<IFWL_ComboBox> pComboBox(new IFWL_ComboBox(
-      m_pApp, m_pProperties->MakeWidgetImpProperties(&m_comboBoxData)));
-  pComboBox->Initialize();
+  m_pIface = pdfium::MakeUnique<IFWL_ComboBox>(
+      m_pApp, m_pProperties->MakeWidgetImpProperties(&m_comboBoxData));
 
-  m_pIface = std::move(pComboBox);
   CFWL_Widget::Initialize();
 }
 
 int32_t CFWL_ComboBox::AddString(const CFX_WideStringC& wsText) {
   std::unique_ptr<CFWL_ComboBoxItem> pItem(new CFWL_ComboBoxItem);
   pItem->m_wsText = wsText;
   pItem->m_dwStyles = 0;
   m_comboBoxData.m_ItemArray.push_back(std::move(pItem));
   return m_comboBoxData.m_ItemArray.size() - 1;
 }
@@ skipping 334 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() {}