Use smart pointers for class owned pointers

fpdfsdk/formfiller/cffl_textfield.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_textfield.h"
 
 #include "fpdfsdk/formfiller/cba_fontmap.h"
 #include "fpdfsdk/include/fsdk_common.h"
 #include "fpdfsdk/include/fsdk_mgr.h"
 
 CFFL_TextField::CFFL_TextField(CPDFDoc_Environment* pApp, CPDFSDK_Annot* pAnnot)
-    : CFFL_FormFiller(pApp, pAnnot), m_pFontMap(nullptr) {
-  m_State.nStart = m_State.nEnd = 0;
-}
+    : CFFL_FormFiller(pApp, pAnnot) {}
 
 CFFL_TextField::~CFFL_TextField() {
   for (const auto& it : m_Maps)
     it.second->InvalidateFocusHandler(this);
-  delete m_pFontMap;
 }
 
 PWL_CREATEPARAM CFFL_TextField::GetCreateParam() {
   PWL_CREATEPARAM cp = CFFL_FormFiller::GetCreateParam();
 
   int nFlags = m_pWidget->GetFieldFlags();
 
   if (nFlags & FIELDFLAG_PASSWORD) {
     cp.dwFlags |= PES_PASSWORD;
   }
@@ skipping 29 matching lines @@
       break;
     case BF_ALIGN_MIDDLE:
       cp.dwFlags |= PES_MIDDLE;
       break;
     case BF_ALIGN_RIGHT:
       cp.dwFlags |= PES_RIGHT;
       break;
   }
 
   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();
   cp.pFocusHandler = this;
 
   return cp;
 }
 
 CPWL_Wnd* CFFL_TextField::NewPDFWindow(const PWL_CREATEPARAM& cp,
                                        CPDFSDK_PageView* pPageView) {
   CPWL_Edit* pWnd = new CPWL_Edit();
   pWnd->AttachFFLData(this);
   pWnd->Create(cp);
@@ skipping 191 matching lines @@
 
     pEdit->SetReadyToInput();
     CFX_WideString wsText = pEdit->GetText();
     int nCharacters = wsText.GetLength();
     CFX_ByteString bsUTFText = wsText.UTF16LE_Encode();
     unsigned short* pBuffer = (unsigned short*)bsUTFText.c_str();
     m_pApp->FFI_OnSetFieldInputFocus(m_pWidget->GetFormField(), pBuffer,
                                      nCharacters, TRUE);
   }
 }