Oilpan: Enable oilpan for callback classes

Source/modules/geolocation/PositionCallback.h

 /*
  * Copyright (C) 2008 Apple 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 14 matching lines @@
 
 #ifndef PositionCallback_h
 #define PositionCallback_h
 
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
     class Geoposition;
 
-    class PositionCallback : public NoBaseWillBeGarbageCollectedFinalized<PositionCallback> {
+    class PositionCallback : public GarbageCollectedFinalized<PositionCallback> {
     public:
         virtual ~PositionCallback() { }
         virtual void trace(Visitor*) { }
         virtual void handleEvent(Geoposition*) = 0;
     };
 
 } // namespace blink
 
 #endif // PositionCallback_h