Remove { delete this; } anti-pattern from IXFA_WidgetIterator

xfa/fxfa/app/xfa_ffpageview.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/fxfa/include/xfa_ffpageview.h"
 
 #include "xfa/fde/fde_render.h"
 #include "xfa/fxfa/app/xfa_ffcheckbutton.h"
@@ skipping 179 matching lines @@
       return NULL;
     }
     if (!pWidget->IsLoaded() &&
         (pWidget->GetStatus() & XFA_WIDGETSTATUS_Visible) != 0) {
       pWidget->LoadWidget();
     }
     return pWidget;
   }
   return NULL;
 }
+
 CXFA_FFTabOrderPageWidgetIterator::CXFA_FFTabOrderPageWidgetIterator(
     CXFA_FFPageView* pPageView,
     uint32_t dwFilter)
     : m_pPageView(pPageView), m_dwFilter(dwFilter), m_iCurWidget(-1) {
   m_bIgnorerelevant = ((CXFA_FFDoc*)m_pPageView->GetDocView()->GetDoc())
                           ->GetXFADoc()
                           ->GetCurVersionMode() < XFA_VERSION_205;
   Reset();
 }
+
 CXFA_FFTabOrderPageWidgetIterator::~CXFA_FFTabOrderPageWidgetIterator() {}
-void CXFA_FFTabOrderPageWidgetIterator::Release() {
-  delete this;
-}
+
 void CXFA_FFTabOrderPageWidgetIterator::Reset() {
   CreateTabOrderWidgetArray();
   m_iCurWidget = -1;
 }
 CXFA_FFWidget* CXFA_FFTabOrderPageWidgetIterator::MoveToFirst() {
   if (m_TabOrderWidgetArray.GetSize() > 0) {
     for (int32_t i = 0; i < m_TabOrderWidgetArray.GetSize(); i++) {
       if (XFA_PageWidgetFilter(m_TabOrderWidgetArray[i], m_dwFilter, TRUE,
                                m_bIgnorerelevant)) {
         m_iCurWidget = i;
@@ skipping 204 matching lines @@
     CXFA_LayoutItem* pLayoutItem) {
   if (CXFA_FFWidget* pWidget = XFA_GetWidgetFromLayoutItem(pLayoutItem)) {
     if (!pWidget->IsLoaded() &&
         (pWidget->GetStatus() & XFA_WIDGETSTATUS_Visible)) {
       pWidget->LoadWidget();
     }
     return pWidget;
   }
   return NULL;
 }