Fix build due to double declaration of TraceTrait<RefPtr<T> >

Source/heap/Handle.h

 /*
  * Copyright (C) 2014 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 378 matching lines @@
 // This should never be called, but is needed to compile.
 template<typename T>
 class TraceTrait<RefPtr<T> > {
 public:
     static void trace(Visitor*, void*)
     {
         ASSERT_NOT_REACHED();
     }
 };
 
-// TraceTrait to allow compilation of trace method bodies when oilpan is disabled.
-// This should never be called, but is needed to compile.
-template<typename T>
-class TraceTrait<RefPtr<T> > {
-public:
-    static void trace(Visitor*, void*)
-    {
-        ASSERT_NOT_REACHED();
-    }
-};
-
 // WeakMember is similar to Member in that it is used to point to other oilpan
 // heap allocated objects.
 // However instead of creating a strong pointer to the object, the WeakMember creates
 // a weak pointer, which does not keep the pointee alive. Hence if all pointers to
 // to a heap allocated object are weak the object will be garbage collected. At the
 // time of GC the weak pointers will automatically be set to null.
 template<typename T>
 class WeakMember : public Member<T> {
 public:
     WeakMember() : Member<T>() { }
@@ skipping 391 matching lines @@
 };
 
 template<typename T> inline T* getPtr(const WebCore::Member<T>& p)
 {
     return p.get();
 }
 
 } // namespace WTF
 
 #endif