Get rid of NULLs in xfa/

xfa/fxfa/app/xfa_ffchoicelist.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/app/xfa_ffchoicelist.h"
 
 #include "xfa/fwl/basewidget/ifwl_edit.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
 #include "xfa/fwl/core/ifwl_app.h"
 #include "xfa/fwl/lightwidget/cfwl_combobox.h"
 #include "xfa/fwl/lightwidget/cfwl_listbox.h"
 #include "xfa/fxfa/app/xfa_fffield.h"
 #include "xfa/fxfa/app/xfa_fwladapter.h"
 #include "xfa/fxfa/include/xfa_ffdoc.h"
 #include "xfa/fxfa/include/xfa_ffdocview.h"
 #include "xfa/fxfa/include/xfa_ffpageview.h"
 #include "xfa/fxfa/include/xfa_ffwidget.h"
 
 CXFA_FFListBox::CXFA_FFListBox(CXFA_FFPageView* pPageView,
                                CXFA_WidgetAcc* pDataAcc)
-    : CXFA_FFField(pPageView, pDataAcc), m_pOldDelegate(NULL) {}
+    : CXFA_FFField(pPageView, pDataAcc), m_pOldDelegate(nullptr) {}
 CXFA_FFListBox::~CXFA_FFListBox() {
   if (m_pNormalWidget) {
     IFWL_Widget* pWidget = m_pNormalWidget->GetWidget();
     CFWL_NoteDriver* pNoteDriver = FWL_GetApp()->GetNoteDriver();
     pNoteDriver->UnregisterEventTarget(pWidget);
   }
 }
 FX_BOOL CXFA_FFListBox::LoadWidget() {
   CFWL_ListBox* pListBox = CFWL_ListBox::Create();
   pListBox->Initialize();
@@ skipping 161 matching lines @@
   }
   m_pOldDelegate->OnProcessEvent(pEvent);
 }
 void CXFA_FFListBox::OnDrawWidget(CFX_Graphics* pGraphics,
                                   const CFX_Matrix* pMatrix) {
   m_pOldDelegate->OnDrawWidget(pGraphics, pMatrix);
 }
 
 CXFA_FFComboBox::CXFA_FFComboBox(CXFA_FFPageView* pPageView,
                                  CXFA_WidgetAcc* pDataAcc)
-    : CXFA_FFField(pPageView, pDataAcc), m_pOldDelegate(NULL) {}
+    : CXFA_FFField(pPageView, pDataAcc), m_pOldDelegate(nullptr) {}
 
 CXFA_FFComboBox::~CXFA_FFComboBox() {}
 
 FX_BOOL CXFA_FFComboBox::GetBBox(CFX_RectF& rtBox,
                                  uint32_t dwStatus,
                                  FX_BOOL bDrawFocus) {
   if (bDrawFocus)
     return FALSE;
   return CXFA_FFWidget::GetBBox(rtBox, dwStatus);
 }
@@ skipping 255 matching lines @@
   FWLEventSelChange(&eParam);
 }
 void CXFA_FFComboBox::OnSelectChanged(IFWL_Widget* pWidget,
                                       const CFX_Int32Array& arrSels,
                                       FX_BOOL bLButtonUp) {
   CXFA_EventParam eParam;
   m_pDataAcc->GetValue(eParam.m_wsPrevText, XFA_VALUEPICTURE_Raw);
   FWLEventSelChange(&eParam);
   if (m_pDataAcc->GetChoiceListCommitOn() == XFA_ATTRIBUTEENUM_Select &&
       bLButtonUp) {
-    m_pDocView->SetFocusWidgetAcc(NULL);
+    m_pDocView->SetFocusWidgetAcc(nullptr);
   }
 }
 void CXFA_FFComboBox::OnPreOpen(IFWL_Widget* pWidget) {
   CXFA_EventParam eParam;
   eParam.m_eType = XFA_EVENT_PreOpen;
   eParam.m_pTarget = m_pDataAcc;
   m_pDataAcc->ProcessEvent(XFA_ATTRIBUTEENUM_PreOpen, &eParam);
 }
 void CXFA_FFComboBox::OnPostOpen(IFWL_Widget* pWidget) {
   CXFA_EventParam eParam;
@@ skipping 31 matching lines @@
     default:
       break;
   }
   m_pOldDelegate->OnProcessEvent(pEvent);
 }
 
 void CXFA_FFComboBox::OnDrawWidget(CFX_Graphics* pGraphics,
                                    const CFX_Matrix* pMatrix) {
   m_pOldDelegate->OnDrawWidget(pGraphics, pMatrix);
 }