[oilpan] The Node hierarchy should have correct accept method chains

Source/core/html/shadow/DetailsMarkerControl.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 49 matching lines @@
     return pseudId;
 }
 
 Result<HTMLSummaryElement> DetailsMarkerControl::summaryElement()
 {
     Element* element = shadowHost();
     ASSERT_WITH_SECURITY_IMPLICATION(!element || element->hasTagName(summaryTag));
     return adoptRawResult(static_cast<HTMLSummaryElement*>(element));
 }
 
+void DetailsMarkerControl::acceptHeapVisitor(Visitor* visitor) const
+{
+    HTMLDivElement::acceptHeapVisitor(visitor);
 }
+
+}