Revert "Make CPDF_Object containers hold objects via unique pointers."

core/fpdfdoc/cpdf_formfield.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 "core/fpdfdoc/cpdf_formfield.h"
 
 #include <set>
 
@@ skipping 821 matching lines @@
   if (iCount < 0 || index >= iCount)
     return -1;
   return pArray->GetIntegerAt(index);
 }
 
 FX_BOOL CPDF_FormField::IsOptionSelected(int iOptIndex) const {
   CPDF_Array* pArray = ToArray(FPDF_GetFieldAttr(m_pDict, "I"));
   if (!pArray)
     return FALSE;
 
-  for (const auto& pObj : *pArray) {
+  for (CPDF_Object* pObj : *pArray) {
     if (pObj->GetInteger() == iOptIndex)
       return TRUE;
   }
   return FALSE;
 }
 
 FX_BOOL CPDF_FormField::SelectOption(int iOptIndex,
                                      FX_BOOL bSelected,
                                      FX_BOOL bNotify) {
   CPDF_Array* pArray = m_pDict->GetArrayFor("I");
@@ skipping 141 matching lines @@
     case ListBox:
       NotifyAfterSelectionChange();
       break;
     case ComboBox:
       NotifyAfterValueChange();
       break;
     default:
       break;
   }
 }