Fix the way to access marked content.

core/src/fpdfapi/fpdf_render/fpdf_render.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 "render_int.h"
 
 #include "core/include/fpdfapi/fpdf_module.h"
 #include "core/include/fpdfapi/fpdf_render.h"
@@ skipping 1377 matching lines @@
     m_pDevice->StretchDIBits(m_pBitmapDevice->GetBitmap(), m_Rect.left,
                              m_Rect.top, m_Rect.Width(), m_Rect.Height());
   }
 }
 FX_BOOL IPDF_OCContext::CheckObjectVisible(const CPDF_PageObject* pObj) {
   const CPDF_ContentMarkData* pData = pObj->m_ContentMark;
   int nItems = pData->CountItems();
   for (int i = 0; i < nItems; i++) {
     CPDF_ContentMarkItem& item = pData->GetItem(i);
     if (item.GetName() == "OC" &&
-        item.GetParamType() == CPDF_ContentMarkItem::PropertiesDict) {
-      CPDF_Dictionary* pOCG =
-          ToDictionary(static_cast<CPDF_Object*>(item.GetParam()));
-      if (!CheckOCGVisible(pOCG)) {
-        return FALSE;
-      }
+        item.GetParamType() == CPDF_ContentMarkItem::PropertiesDict &&
+        !CheckOCGVisible(item.GetParam())) {
+      return FALSE;
     }
   }
   return TRUE;
 }