Remove tons of OILPAN.

sky/engine/core/dom/DocumentMarkerController.cpp

Index: sky/engine/core/dom/DocumentMarkerController.cpp
diff --git a/sky/engine/core/dom/DocumentMarkerController.cpp b/sky/engine/core/dom/DocumentMarkerController.cpp
index 9c06043ce627bbeb5666286fbe9a7d2dcd91fb69..5e1e03e51d55be81bb73a196e6b14c7ff7889227 100644
--- a/sky/engine/core/dom/DocumentMarkerController.cpp
+++ b/sky/engine/core/dom/DocumentMarkerController.cpp
@@ -491,13 +491,6 @@ Vector<IntRect> DocumentMarkerController::renderedRectsForMarkers(DocumentMarker
     return result;
 }
 
-void DocumentMarkerController::trace(Visitor* visitor)
-{
-#if ENABLE(OILPAN)
-    visitor->trace(m_markers);
-#endif
-}
-
 void DocumentMarkerController::removeMarkers(Node* node, DocumentMarker::MarkerTypes markerTypes)
 {
     if (!possiblyHasMarkers(markerTypes))