[Merge to XFA] Revert "Revert "Add type cast definitions for CPDF_Dictionary.""

fpdfsdk/src/formfiller/FFL_Utils.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 <algorithm>
 
 #include "../../include/formfiller/FormFiller.h"
 #include "../../include/formfiller/FFL_Utils.h"
@@ skipping 33 matching lines @@
   switch (pObj->GetType()) {
     case PDFOBJ_ARRAY: {
       CPDF_Array* pArray = (CPDF_Array*)pObj;
       for (FX_DWORD i = 0; i < pArray->GetCount(); i++) {
         CPDF_Object* pElement = pArray->GetElementValue(i);
         TraceObject(pElement);
       }
     } break;
 
     case PDFOBJ_DICTIONARY: {
-      CPDF_Dictionary* pDict = (CPDF_Dictionary*)pObj;
+      CPDF_Dictionary* pDict = pObj->AsDictionary();
 
       FX_POSITION fPos = pDict->GetStartPos();
       CFX_ByteString csKey;
       do {
         CPDF_Object* pElement = pDict->GetNextElement(fPos, csKey);
         // TRACE(csKey + "\n");
         if (!pElement)
           break;
         TraceObject(pElement);
       } while (TRUE);
@@ skipping 25 matching lines @@
     //  case PDFOBJ_KEYWORD:
     //  case PDFOBJ_EOF:
     default:
       break;
   }
   if (dwObjNum == 0)
     return FALSE;
 
   return TRUE;
 }