Oilpan: Remove GC_INFO_{DEFINE,DECLARE} macros

Source/modules/performance/WorkerPerformance.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 25 matching lines @@
 #include "heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 class ExecutionContext;
 
 class WorkerPerformance : public RefCountedWillBeGarbageCollectedFinalized<WorkerPerformance>, public ScriptWrappable {
-    DECLARE_GC_INFO;
 public:
     static PassRefPtrWillBeRawPtr<WorkerPerformance> create() { return adoptRefWillBeNoop(new WorkerPerformance()); }
     ~WorkerPerformance();
 
     double now(ExecutionContext*) const;
 
     void trace(Visitor*) { }
 
 private:
     WorkerPerformance();
 };
 
 }
 
 #endif // WorkerPerformance_h