Use std::vector as internal storage for CPDF_Array

core/fpdfapi/fpdf_parser/cpdf_parser.cpp

 // Copyright 2016 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/fpdfapi/fpdf_parser/include/cpdf_parser.h"
 
 #include <vector>
 
@@ skipping 970 matching lines @@
     ShrinkObjectMap(size);
     for (auto& it : m_ObjectInfo)
       it.second.type = 0;
   } else {
     m_Trailers.Add(ToDictionary(pStream->GetDict()->Clone()));
   }
 
   std::vector<std::pair<int32_t, int32_t>> arrIndex;
   CPDF_Array* pArray = pStream->GetDict()->GetArrayBy("Index");
   if (pArray) {
-    uint32_t nPairSize = pArray->GetCount() / 2;
-    for (uint32_t i = 0; i < nPairSize; i++) {
+    for (size_t i = 0; i < pArray->GetCount() / 2; i++) {
       CPDF_Object* pStartNumObj = pArray->GetObjectAt(i * 2);
       CPDF_Object* pCountObj = pArray->GetObjectAt(i * 2 + 1);
 
       if (ToNumber(pStartNumObj) && ToNumber(pCountObj)) {
         int nStartNum = pStartNumObj->GetInteger();
         int nCount = pCountObj->GetInteger();
         if (nStartNum >= 0 && nCount > 0)
           arrIndex.push_back(std::make_pair(nStartNum, nCount));
       }
     }
   }
 
   if (arrIndex.size() == 0)
     arrIndex.push_back(std::make_pair(0, size));
 
   pArray = pStream->GetDict()->GetArrayBy("W");
   if (!pArray) {
     pStream->Release();
     return FALSE;
   }
 
   CFX_ArrayTemplate<uint32_t> WidthArray;
   FX_SAFE_UINT32 dwAccWidth = 0;
-  for (uint32_t i = 0; i < pArray->GetCount(); i++) {
+  for (size_t i = 0; i < pArray->GetCount(); i++) {
     WidthArray.Add(pArray->GetIntegerAt(i));
     dwAccWidth += WidthArray[i];
   }
 
   if (!dwAccWidth.IsValid() || WidthArray.GetSize() < 3) {
     pStream->Release();
     return FALSE;
   }
 
   uint32_t totalWidth = dwAccWidth.ValueOrDie();
@@ skipping 617 matching lines @@
   if (!LoadLinearizedAllCrossRefV4(m_LastXRefOffset, m_dwXrefStartObjNum) &&
       !LoadLinearizedAllCrossRefV5(m_LastXRefOffset)) {
     m_LastXRefOffset = 0;
     m_pSyntax->m_MetadataObjnum = dwSaveMetadataObjnum;
     return FORMAT_ERROR;
   }
 
   m_pSyntax->m_MetadataObjnum = dwSaveMetadataObjnum;
   return SUCCESS;
 }