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

fpdfsdk/src/fsdk_mgr.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 "../../public/fpdf_ext.h"
 #include "../../third_party/base/nonstd_unique_ptr.h"
 #include "../include/formfiller/FFL_FormFiller.h"
 #include "../include/fsdk_define.h"
@@ skipping 467 matching lines @@
   CPDF_Object* pOpenAction = pRoot->GetDict("OpenAction");
   if (!pOpenAction)
     pOpenAction = pRoot->GetArray("OpenAction");
 
   if (!pOpenAction)
     return FALSE;
 
   if (pOpenAction->GetType() == PDFOBJ_ARRAY)
     return TRUE;
 
-  if (pOpenAction->GetType() == PDFOBJ_DICTIONARY) {
-    CPDF_Dictionary* pDict = (CPDF_Dictionary*)pOpenAction;
+  if (CPDF_Dictionary* pDict = pOpenAction->AsDictionary()) {
     CPDF_Action action(pDict);
     if (m_pEnv->GetActionHander())
       m_pEnv->GetActionHander()->DoAction_DocOpen(action, this);
     return TRUE;
   }
   return FALSE;
 }
 
 CPDF_OCContext* CPDFSDK_Document::GetOCContext() {
   if (!m_pOccontent)
@@ skipping 677 matching lines @@
   if (!pFocusAnnot)
     return NULL;
 
   for (int i = 0; i < m_fxAnnotArray.GetSize(); i++) {
     CPDFSDK_Annot* pAnnot = (CPDFSDK_Annot*)m_fxAnnotArray.GetAt(i);
     if (pAnnot == pFocusAnnot)
       return pAnnot;
   }
   return NULL;
 }