Add type cast definitions for CPDF_Array.

core/src/fpdfdoc/doc_bookmark.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 <vector>
 
 #include "../../../third_party/base/nonstd_unique_ptr.h"
 #include "../../include/fpdfdoc/fpdf_doc.h"
@@ skipping 50 matching lines @@
     return CFX_WideString();
   }
   nonstd::unique_ptr<FX_WCHAR[]> buf(new FX_WCHAR[len]);
   for (int i = 0; i < len; i++) {
     FX_WCHAR w = title[i];
     buf[i] = w > 0x20 ? w : 0x20;
   }
   return CFX_WideString(buf.get(), len);
 }
 CPDF_Dest CPDF_Bookmark::GetDest(CPDF_Document* pDocument) const {
-  if (!m_pDict) {
+  if (!m_pDict)
     return CPDF_Dest();
-  }
+
   CPDF_Object* pDest = m_pDict->GetElementValue("Dest");
   if (!pDest)
     return CPDF_Dest();
-
   if (pDest->IsString() || pDest->IsName()) {
     CPDF_NameTree name_tree(pDocument, FX_BSTRC("Dests"));
     CFX_ByteStringC name = pDest->GetString();
     return CPDF_Dest(name_tree.LookupNamedDest(pDocument, name));
   }
-  if (pDest->GetType() == PDFOBJ_ARRAY) {
-    return CPDF_Dest((CPDF_Array*)pDest);
-  }
+  if (CPDF_Array* pArray = pDest->AsArray())
+    return CPDF_Dest(pArray);
   return CPDF_Dest();
 }
 CPDF_Action CPDF_Bookmark::GetAction() const {
   if (!m_pDict) {
     return CPDF_Action();
   }
   return CPDF_Action(m_pDict->GetDict("A"));
 }