Remove tons of OILPAN.

sky/engine/core/dom/shadow/ElementShadow.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.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 297 matching lines @@
         shadow->setNeedsSelectFeatureSet();
     }
     setNeedsDistributionRecalc();
 }
 
 void ElementShadow::clearDistribution()
 {
     m_nodeToInsertionPoints.clear();
 }
 
-void ElementShadow::trace(Visitor* visitor)
-{
-#if ENABLE(OILPAN)
-    visitor->trace(m_nodeToInsertionPoints);
-    visitor->trace(m_selectFeatures);
-    // Shadow roots are linked with previous and next pointers which are traced.
-    // It is therefore enough to trace one of the shadow roots here and the
-    // rest will be traced from there.
-    visitor->trace(m_shadowRoots.head());
-#endif
-}
-
 } // namespace