Use smart pointers for class owned pointers

fpdfsdk/formfiller/cffl_listbox.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 "fpdfsdk/formfiller/cffl_listbox.h"
 
 #include "fpdfsdk/formfiller/cba_fontmap.h"
 #include "fpdfsdk/formfiller/cffl_formfiller.h"
 #include "fpdfsdk/formfiller/cffl_iformfiller.h"
 #include "fpdfsdk/include/fsdk_common.h"
 #include "fpdfsdk/include/fsdk_mgr.h"
 #include "fpdfsdk/pdfwindow/PWL_ListBox.h"
 
 #define FFL_DEFAULTLISTBOXFONTSIZE 12.0f
 
 CFFL_ListBox::CFFL_ListBox(CPDFDoc_Environment* pApp, CPDFSDK_Annot* pWidget)
-    : CFFL_FormFiller(pApp, pWidget), m_pFontMap(nullptr) {}
+    : CFFL_FormFiller(pApp, pWidget) {}
 
-CFFL_ListBox::~CFFL_ListBox() {
-  delete m_pFontMap;
-}
+CFFL_ListBox::~CFFL_ListBox() {}
 
 PWL_CREATEPARAM CFFL_ListBox::GetCreateParam() {
   PWL_CREATEPARAM cp = CFFL_FormFiller::GetCreateParam();
 
   uint32_t dwFieldFlag = m_pWidget->GetFieldFlags();
 
   if (dwFieldFlag & FIELDFLAG_MULTISELECT) {
     cp.dwFlags |= PLBS_MULTIPLESEL;
   }
 
   cp.dwFlags |= PWS_VSCROLL;
 
   if (cp.dwFlags & PWS_AUTOFONTSIZE)
     cp.fFontSize = FFL_DEFAULTLISTBOXFONTSIZE;
 
   if (!m_pFontMap)
-    m_pFontMap = new CBA_FontMap(m_pWidget, m_pApp->GetSysHandler());
-  cp.pFontMap = m_pFontMap;
+    m_pFontMap.reset(new CBA_FontMap(m_pWidget, m_pApp->GetSysHandler()));
+  cp.pFontMap = m_pFontMap.get();
 
   return cp;
 }
 
 CPWL_Wnd* CFFL_ListBox::NewPDFWindow(const PWL_CREATEPARAM& cp,
                                      CPDFSDK_PageView* pPageView) {
   CPWL_ListBox* pWnd = new CPWL_ListBox();
   pWnd->AttachFFLData(this);
   pWnd->Create(cp);
 
@@ skipping 147 matching lines @@
     RestoreState(pPageView);
     pRet = GetPDFWindow(pPageView, FALSE);
   } else {
     pRet = GetPDFWindow(pPageView, TRUE);
   }
 
   m_pWidget->UpdateField();
 
   return pRet;
 }