Oilpan: move WorkerGlobalScope to oilpan's heap.

Source/modules/indexeddb/WorkerGlobalScopeIndexedDatabase.h

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 #ifndef WorkerGlobalScopeIndexedDatabase_h
 #define WorkerGlobalScopeIndexedDatabase_h
 
-#include "core/workers/WorkerSupplementable.h"
+#include "platform/Supplementable.h"
 
 namespace WebCore {
 
 class IDBFactory;
 class IDBFactoryBackendInterface;
 class ExecutionContext;
+class WorkerGlobalScope;
 
-class WorkerGlobalScopeIndexedDatabase FINAL : public WorkerSupplement {
+class WorkerGlobalScopeIndexedDatabase FINAL : public NoBaseWillBeGarbageCollected<WorkerGlobalScopeIndexedDatabase>, public WillBeHeapSupplement<WorkerGlobalScope> {
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(WorkerGlobalScopeIndexedDatabase);
 public:
     virtual ~WorkerGlobalScopeIndexedDatabase();
-    static WorkerGlobalScopeIndexedDatabase& from(WorkerSupplementable&);
+    static WorkerGlobalScopeIndexedDatabase& from(WillBeHeapSupplementable<WorkerGlobalScope>&);
 
-    static IDBFactory* indexedDB(WorkerSupplementable&);
+    static IDBFactory* indexedDB(WillBeHeapSupplementable<WorkerGlobalScope>&);
+
+    virtual void trace(Visitor*);
 
 private:
     WorkerGlobalScopeIndexedDatabase();
 
     IDBFactory* indexedDB();
     static const char* supplementName();
 
     RefPtr<IDBFactoryBackendInterface> m_factoryBackend;
     RefPtr<IDBFactory> m_idbFactory;
 };
 
 } // namespace WebCore
 
 #endif // WorkerGlobalScopeIndexedDatabase_h