Simplify Supplementables post Oilpan.

third_party/WebKit/Source/core/workers/WorkerClients.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 21 matching lines @@
 #define WorkerClients_h
 
 #include "platform/Supplementable.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 // This is created on the main thread, passed to the worker thread and
 // attached to WorkerGlobalScope when it is created.
 // This class can be used to provide "client" implementations to Workers.
-class WorkerClients final : public GarbageCollectedFinalized<WorkerClients>, public HeapSupplementable<WorkerClients> {
+class WorkerClients final : public GarbageCollectedFinalized<WorkerClients>, public Supplementable<WorkerClients> {
     USING_GARBAGE_COLLECTED_MIXIN(WorkerClients);
     WTF_MAKE_NONCOPYABLE(WorkerClients);
 public:
-    static RawPtr<WorkerClients> create()
+    static WorkerClients* create()
     {
-        return new WorkerClients();
+        return new WorkerClients;
     }
 
-    virtual ~WorkerClients() { }
-
-#if ENABLE(OILPAN)
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
-        HeapSupplementable<WorkerClients>::trace(visitor);
+        Supplementable<WorkerClients>::trace(visitor);
     }
-#endif
 
 private:
     WorkerClients() { }
 };
 
 } // namespace blink
 
 #endif // WorkerClients_h