Use std::vector as internal storage for CPDF_Array

xfa/fxfa/app/xfa_ffdoc.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/include/xfa_ffdoc.h"
 
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
@@ skipping 224 matching lines @@
   if (pAcroForm == NULL) {
     return FALSE;
   }
   CPDF_Object* pElementXFA = pAcroForm->GetDirectObjectBy("XFA");
   if (pElementXFA == NULL) {
     return FALSE;
   }
   CFX_ArrayTemplate<CPDF_Stream*> xfaStreams;
   if (pElementXFA->IsArray()) {
     CPDF_Array* pXFAArray = (CPDF_Array*)pElementXFA;
-    uint32_t count = pXFAArray->GetCount() / 2;
-    for (uint32_t i = 0; i < count; i++) {
+    for (size_t i = 0; i < pXFAArray->GetCount() / 2; i++) {
       if (CPDF_Stream* pStream = pXFAArray->GetStreamAt(i * 2 + 1))
         xfaStreams.Add(pStream);
     }
   } else if (pElementXFA->IsStream()) {
     xfaStreams.Add((CPDF_Stream*)pElementXFA);
   }
   if (xfaStreams.GetSize() < 1) {
     return FALSE;
   }
   IFX_FileRead* pFileRead = new CXFA_FileRead(xfaStreams);
@@ skipping 87 matching lines @@
     return nullptr;
 
   CPDF_Dictionary* pXFAImages = pNames->GetDictBy("XFAImages");
   if (!pXFAImages)
     return nullptr;
 
   CPDF_NameTree nametree(pXFAImages);
   CFX_ByteString bsName = PDF_EncodeText(wsName.c_str(), wsName.GetLength());
   CPDF_Object* pObject = nametree.LookupValue(bsName);
   if (!pObject) {
-    int32_t iCount = nametree.GetCount();
-    for (int32_t i = 0; i < iCount; i++) {
+    for (size_t i = 0; i < nametree.GetCount(); i++) {
       CFX_ByteString bsTemp;
       CPDF_Object* pTempObject = nametree.LookupValue(i, bsTemp);
       if (bsTemp == bsName) {
         pObject = pTempObject;
         break;
       }
     }
   }
 
   if (!pObject || !pObject->IsStream())
@@ skipping 56 matching lines @@
   }
   pExport->Release();
   return bFlags;
 }
 FX_BOOL CXFA_FFDoc::ImportData(IFX_FileRead* pStream, FX_BOOL bXDP) {
   std::unique_ptr<CXFA_DataImporter, ReleaseDeleter<CXFA_DataImporter>>
       importer(new CXFA_DataImporter(m_pDocument));
 
   return importer->ImportData(pStream);
 }