Remove more bits of the Oilpan tracing system

sky/engine/wtf/HashMap.h

 /*
  * Copyright (C) 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 135 matching lines @@
         // An alternate version of add() that finds the object by hashing and comparing
         // with some other type, to avoid the cost of type conversion if the object is already
         // in the table. HashTranslator must have the following function members:
         //   static unsigned hash(const T&);
         //   static bool equal(const ValueType&, const T&);
         //   static translate(ValueType&, const T&, unsigned hashCode);
         template<typename HashTranslator, typename T> AddResult add(const T&, MappedPassInType);
 
         static bool isValidKey(KeyPeekInType);
 
-        void trace(typename Allocator::Visitor* visitor) { m_impl.trace(visitor); }
-
     private:
         AddResult inlineAdd(KeyPassInType, MappedPassInReferenceType);
 
         HashTableType m_impl;
     };
 
     template<typename KeyArg, typename MappedArg, typename HashArg, typename KeyTraitsArg, typename MappedTraitsArg, typename Allocator>
     class HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg, Allocator>::HashMapKeysProxy :
         private HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg, Allocator> {
         public:
@@ skipping 318 matching lines @@
         typedef typename HashMap<T, U, V, W, X, Y>::const_iterator::Values iterator;
 
         vector.resize(collection.size());
 
         iterator it = collection.begin().values();
         iterator end = collection.end().values();
         for (unsigned i = 0; it != end; ++it, ++i)
             vector[i] = *it;
     }
 
-#if !ENABLE(OILPAN)
-template<typename T, typename U, typename V, typename W, typename X>
-struct NeedsTracing<HashMap<T, U, V, W, X> > {
-    static const bool value = false;
-};
-#endif
-
 } // namespace WTF
 
 using WTF::HashMap;
 
 #endif /* WTF_HashMap_h */