Remove tons of OILPAN.

sky/engine/core/dom/shadow/ShadowRoot.cpp

Index: sky/engine/core/dom/shadow/ShadowRoot.cpp
diff --git a/sky/engine/core/dom/shadow/ShadowRoot.cpp b/sky/engine/core/dom/shadow/ShadowRoot.cpp
index ad544f5748a5b10afbce76fe44ae0d1bd54624a7..3941a1fc7c7995a4eac059994165bbd1af7f00ae 100644
--- a/sky/engine/core/dom/shadow/ShadowRoot.cpp
+++ b/sky/engine/core/dom/shadow/ShadowRoot.cpp
@@ -255,13 +255,4 @@ StyleSheetList* ShadowRoot::styleSheets()
     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);
-}
-
 }