Remove ENABLE(OILPAN) uses in wtf/

third_party/WebKit/Source/wtf/LinkedHashSet.h

 /*
  * Copyright (C) 2005, 2006, 2007, 2008, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011, Benjamin Poulain <ikipou@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 757 matching lines @@
     // wrong to have a GC when only one was swapped and the other still
     // contained garbage (eg. from a previous use of the same slot).
     // Therefore we forbid a GC until both the key and the value are
     // swapped.
     Allocator::enterGCForbiddenScope();
     swap(static_cast<Base&>(a), static_cast<Base&>(b));
     swap(a.m_value, b.m_value);
     Allocator::leaveGCForbiddenScope();
 }
 
-#if !ENABLE(OILPAN)
-template<typename T, typename U, typename V>
-struct NeedsTracing<LinkedHashSet<T, U, V>> {
-    STATIC_ONLY(NeedsTracing);
-    static const bool value = false;
-};
-#endif
-
 } // namespace WTF
 
 using WTF::LinkedHashSet;
 
 #endif /* WTF_LinkedHashSet_h */