Cleanup CPDFXFA_Document.

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"
@@ skipping 269 matching lines @@
     dwEditStyles |= FWL_STYLEEXT_EDT_AutoHScroll;
   }
   pComboBox->EditModifyStylesEx(dwEditStyles, 0xFFFFFFFF);
 }
 FX_BOOL CXFA_FFComboBox::OnRButtonUp(uint32_t dwFlags,
                                      FX_FLOAT fx,
                                      FX_FLOAT fy) {
   if (!CXFA_FFField::OnRButtonUp(dwFlags, fx, fy))
     return FALSE;
 
-  GetDoc()->GetDocProvider()->PopupMenu(this, CFX_PointF(fx, fy), nullptr);
+  GetDoc()->GetDocProvider()->PopupMenu(this, CFX_PointF(fx, fy));
   return TRUE;
 }
 FX_BOOL CXFA_FFComboBox::OnKillFocus(CXFA_FFWidget* pNewWidget) {
   FX_BOOL flag = ProcessCommittedData();
   if (!flag) {
     UpdateFWLData();
   }
   CXFA_FFField::OnKillFocus(pNewWidget);
   return TRUE;
 }
@@ skipping 223 matching lines @@
     default:
       break;
   }
   m_pOldDelegate->OnProcessEvent(pEvent);
 }
 
 void CXFA_FFComboBox::OnDrawWidget(CFX_Graphics* pGraphics,
                                    const CFX_Matrix* pMatrix) {
   m_pOldDelegate->OnDrawWidget(pGraphics, pMatrix);
 }