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

fpdfsdk/src/fsdk_mgr.cpp

Index: fpdfsdk/src/fsdk_mgr.cpp
diff --git a/fpdfsdk/src/fsdk_mgr.cpp b/fpdfsdk/src/fsdk_mgr.cpp
index fb5df1ea5ea82482780ff5f135a944afb86324ad..63ed642367f9062a4012880c872d424d8fb40b8b 100644
--- a/fpdfsdk/src/fsdk_mgr.cpp
+++ b/fpdfsdk/src/fsdk_mgr.cpp
@@ -485,8 +485,7 @@ FX_BOOL CPDFSDK_Document::ProcOpenAction() {
   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);