Remove tons of OILPAN.

sky/engine/core/dom/ChildListMutationScope.cpp

Index: sky/engine/core/dom/ChildListMutationScope.cpp
diff --git a/sky/engine/core/dom/ChildListMutationScope.cpp b/sky/engine/core/dom/ChildListMutationScope.cpp
index 7c61184311a83a265144984f75a57f5902736636..f613572259968b0ba3c9bdef39676c046dddfd7d 100644
--- a/sky/engine/core/dom/ChildListMutationScope.cpp
+++ b/sky/engine/core/dom/ChildListMutationScope.cpp
@@ -157,15 +157,4 @@ bool ChildListMutationAccumulator::isEmpty()
     return result;
 }
 
-void ChildListMutationAccumulator::trace(Visitor* visitor)
-{
-    visitor->trace(m_target);
-    visitor->trace(m_removedNodes);
-    visitor->trace(m_addedNodes);
-    visitor->trace(m_previousSibling);
-    visitor->trace(m_nextSibling);
-    visitor->trace(m_lastAdded);
-    visitor->trace(m_observers);
-}
-
 } // namespace blink