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

Source/core/html/shadow/PickerIndicatorElement.cpp

 /*
  * Copyright (C) 2012 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 114 matching lines @@
         return;
     m_chooser->endChooser();
 }
 
 void PickerIndicatorElement::detach()
 {
     closePopup();
     HTMLDivElement::detach();
 }
 
+void PickerIndicatorElement::acceptHeapVisitor(Visitor* visitor) const
+{
+    HTMLDivElement::acceptHeapVisitor(visitor);
+}
+
 }
 
 #endif