Remove tons of OILPAN.

sky/engine/core/editing/SplitElementCommand.cpp

 /*
  * Copyright (C) 2005, 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 89 matching lines @@
 }
 
 void SplitElementCommand::doReapply()
 {
     if (!m_element1)
         return;
 
     executeApply();
 }
 
-void SplitElementCommand::trace(Visitor* visitor)
-{
-    visitor->trace(m_element1);
-    visitor->trace(m_element2);
-    visitor->trace(m_atChild);
-    SimpleEditCommand::trace(visitor);
-}
-
 } // namespace blink