Remove tons of OILPAN.

sky/engine/core/dom/shadow/ShadowRoot.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.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 237 matching lines @@
 }
 
 StyleSheetList* ShadowRoot::styleSheets()
 {
     if (!ensureShadowRootRareData()->styleSheets())
         m_shadowRootRareData->setStyleSheets(StyleSheetList::create(this));
 
     return m_shadowRootRareData->styleSheets();
 }
 
-void ShadowRoot::trace(Visitor* visitor)
-{
-    visitor->trace(m_prev);
-    visitor->trace(m_next);
-    visitor->trace(m_shadowRootRareData);
-    TreeScope::trace(visitor);
-    DocumentFragment::trace(visitor);
 }
-
-}