Oilpan: Remove GC_INFO_{DEFINE,DECLARE} macros

Source/core/testing/GCObservation.h

 /*
  * Copyright (C) 2013 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 22 matching lines @@
 
 #include "bindings/v8/ScopedPersistent.h"
 #include "heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include <v8.h>
 
 namespace WebCore {
 
 class GCObservation : public RefCountedWillBeGarbageCollectedFinalized<GCObservation> {
-    DECLARE_GC_INFO;
 public:
     static PassRefPtrWillBeRawPtr<GCObservation> create(v8::Handle<v8::Value> observedValue)
     {
         return adoptRefWillBeNoop(new GCObservation(observedValue));
     }
     ~GCObservation() { }
 
     // Caution: It is only feasible to determine whether an object was
     // "near death"; it may have been kept alive through a weak
     // handle. After reaching near-death, having been collected is the
     // common case.
     bool wasCollected() const { return m_collected; }
     void setWasCollected();
 
     void trace(Visitor*) { }
 
 private:
     explicit GCObservation(v8::Handle<v8::Value>);
 
     ScopedPersistent<v8::Value> m_observed;
     bool m_collected;
 };
 
 }
 
 #endif // GCObservation_h