Use std::vector as internal storage for CPDF_Array

core/fpdfapi/fpdf_edit/fpdf_edit_doc.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 <limits.h>
 
 #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
 #include "core/fpdfapi/fpdf_font/include/cpdf_fontencoding.h"
@@ skipping 1015 matching lines @@
 static int InsertDeletePDFPage(CPDF_Document* pDoc,
                                CPDF_Dictionary* pPages,
                                int nPagesToGo,
                                CPDF_Dictionary* pPage,
                                FX_BOOL bInsert,
                                CFX_ArrayTemplate<CPDF_Dictionary*>& stackList) {
   CPDF_Array* pKidList = pPages->GetArrayBy("Kids");
   if (!pKidList) {
     return -1;
   }
-  int nKids = pKidList->GetCount();
-  for (int i = 0; i < nKids; i++) {
+  for (size_t i = 0; i < pKidList->GetCount(); i++) {
     CPDF_Dictionary* pKid = pKidList->GetDictAt(i);
     if (pKid->GetStringBy("Type") == "Page") {
       if (nPagesToGo == 0) {
         if (bInsert) {
           pKidList->InsertAt(i, new CPDF_Reference(pDoc, pPage->GetObjNum()));
           pPage->SetAtReference("Parent", pDoc, pPages->GetObjNum());
         } else {
           pKidList->RemoveAt(i);
         }
         pPages->SetAtInteger(
@@ skipping 103 matching lines @@
 void FPDFAPI_FlatPageAttr(CPDF_Dictionary* pPageDict,
                           const CFX_ByteStringC& name) {
   if (pPageDict->KeyExist(name)) {
     return;
   }
   CPDF_Object* pObj = FPDFAPI_GetPageAttr(pPageDict, name);
   if (pObj) {
     pPageDict->SetAt(name, pObj->Clone());
   }
 }