Use std::map as CPDF_Dictionary's underlying store.

core/src/fpdfapi/fpdf_page/fpdf_page_parser.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 "pageint.h"
 
 #include "core/include/fpdfapi/fpdf_module.h"
 #include "core/include/fpdfapi/fpdf_page.h"
@@ skipping 470 matching lines @@
       return CFX_ByteStringC(table[i].m_Ptr, table[i].m_Size);
     }
     i += 2;
   }
   return CFX_ByteStringC();
 }
 void _PDF_ReplaceAbbr(CPDF_Object* pObj) {
   switch (pObj->GetType()) {
     case PDFOBJ_DICTIONARY: {
       CPDF_Dictionary* pDict = pObj->AsDictionary();
-      FX_POSITION pos = pDict->GetStartPos();
-      while (pos) {
-        CFX_ByteString key;
-        CPDF_Object* value = pDict->GetNextElement(pos, key);
+      for (const auto& it : *pDict) {
+        CFX_ByteString key = it.first;
+        CPDF_Object* value = it.second;
         CFX_ByteStringC fullname = _PDF_FindFullName(
             _PDF_InlineKeyAbbr, sizeof _PDF_InlineKeyAbbr / sizeof(_FX_BSTR),
             key);
         if (!fullname.IsEmpty()) {
           pDict->ReplaceKey(key, fullname);
           key = fullname;
         }
 
         if (value->IsName()) {
           CFX_ByteString name = value->GetString();
@@ skipping 40 matching lines @@
       return CFX_ByteStringC(table[i + 1].m_Ptr, table[i + 1].m_Size);
     }
     i += 2;
   }
   return CFX_ByteStringC();
 }
 void _PDF_ReplaceFull(CPDF_Object* pObj) {
   switch (pObj->GetType()) {
     case PDFOBJ_DICTIONARY: {
       CPDF_Dictionary* pDict = pObj->AsDictionary();
-      FX_POSITION pos = pDict->GetStartPos();
-      while (pos) {
-        CFX_ByteString key;
-        CPDF_Object* value = pDict->GetNextElement(pos, key);
+      for (const auto& it : *pDict) {
+        CFX_ByteString key = it.first;
+        CPDF_Object* value = it.second;
         CFX_ByteStringC abbrName = _PDF_FindAbbrName(
             _PDF_InlineKeyAbbr, sizeof(_PDF_InlineKeyAbbr) / sizeof(_FX_BSTR),
             key);
         if (!abbrName.IsEmpty()) {
           pDict->ReplaceKey(key, abbrName);
           key = abbrName;
         }
         if (value->IsName()) {
           CFX_ByteString name = value->GetString();
           abbrName = _PDF_FindAbbrName(
@@ skipping 949 matching lines @@
     m_pObjectList->m_ObjectList.AddTail(pPathObj);
   }
   if (PathClipType) {
     if (!matrix.IsIdentity()) {
       Path.Transform(&matrix);
       matrix.SetIdentity();
     }
     m_pCurStates->m_ClipPath.AppendPath(Path, PathClipType, TRUE);
   }
 }