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

xfa/fwl/core/ifwl_picturebox.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/ifwl_picturebox.h"
 
+#include "third_party/base/ptr_util.h"
 #include "xfa/fwl/core/cfwl_picturebox.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
 
 IFWL_PictureBox::IFWL_PictureBox(const IFWL_App* app,
                                  const CFWL_WidgetImpProperties& properties)
     : IFWL_Widget(app, properties, nullptr),
       m_bTop(FALSE),
       m_bVCenter(FALSE),
       m_bButton(FALSE) {
   m_rtClient.Reset();
   m_rtImage.Reset();
   m_matrix.SetIdentity();
+
+  SetDelegate(pdfium::MakeUnique<CFWL_PictureBoxImpDelegate>(this));
 }
 
 IFWL_PictureBox::~IFWL_PictureBox() {}
 
-void IFWL_PictureBox::Initialize() {
-  IFWL_Widget::Initialize();
-  m_pDelegate = new CFWL_PictureBoxImpDelegate(this);
-}
-
-void IFWL_PictureBox::Finalize() {
-  delete m_pDelegate;
-  m_pDelegate = nullptr;
-  IFWL_Widget::Finalize();
-}
-
 FWL_Type IFWL_PictureBox::GetClassID() const {
   return FWL_Type::PictureBox;
 }
 
 FWL_Error IFWL_PictureBox::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
   if (bAutoSize) {
     rect.Set(0, 0, 0, 0);
     if (!m_pProperties->m_pDataProvider)
       return FWL_Error::Indefinite;
     CFX_DIBitmap* pBitmap =
@@ skipping 81 matching lines @@
   return false;
 }
 
 CFWL_PictureBoxImpDelegate::CFWL_PictureBoxImpDelegate(IFWL_PictureBox* pOwner)
     : m_pOwner(pOwner) {}
 
 void CFWL_PictureBoxImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
                                               const CFX_Matrix* pMatrix) {
   m_pOwner->DrawWidget(pGraphics, pMatrix);
 }