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

Source/core/html/shadow/DetailsMarkerControl.cpp

Index: Source/core/html/shadow/DetailsMarkerControl.cpp
diff --git a/Source/core/html/shadow/DetailsMarkerControl.cpp b/Source/core/html/shadow/DetailsMarkerControl.cpp
index a76f28e9b1e0ed5bdc9930fbb0a190527d4890f6..afbe3e7d562ea532f6d0b74eea9b2d580048c15c 100644
--- a/Source/core/html/shadow/DetailsMarkerControl.cpp
+++ b/Source/core/html/shadow/DetailsMarkerControl.cpp
@@ -67,4 +67,9 @@ Result<HTMLSummaryElement> DetailsMarkerControl::summaryElement()
     return adoptRawResult(static_cast<HTMLSummaryElement*>(element));
 }
 
+void DetailsMarkerControl::acceptHeapVisitor(Visitor* visitor) const
+{
+    HTMLDivElement::acceptHeapVisitor(visitor);
+}
+
 }