Remove tons of OILPAN.

sky/engine/core/editing/VisibleSelection.cpp

 /*
  * Copyright (C) 2004, 2005, 2006 Apple Computer, 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 743 matching lines @@
     ASSERT(m_changeObserver);
     m_changeObserver = nullptr;
 }
 
 void VisibleSelection::didChange()
 {
     if (m_changeObserver)
         m_changeObserver->didChangeVisibleSelection();
 }
 
-void VisibleSelection::trace(Visitor* visitor)
-{
-    visitor->trace(m_base);
-    visitor->trace(m_extent);
-    visitor->trace(m_start);
-    visitor->trace(m_end);
-    visitor->trace(m_changeObserver);
-}
-
 static bool isValidPosition(const Position& position)
 {
     if (!position.inDocument())
         return false;
 
     if (position.anchorType() != Position::PositionIsOffsetInAnchor)
         return true;
 
     if (position.offsetInContainerNode() < 0)
         return false;
@@ skipping 73 matching lines @@
     sel.showTreeForThis();
 }
 
 void showTree(const blink::VisibleSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 
 #endif