Oilpan: Replace most of RefPtrs for Event objects with oilpan's transition types

Source/modules/indexeddb/IDBDatabase.h

 /*
  * Copyright (C) 2010 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:
  *
  * 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
@@ skipping 80 matching lines @@
     virtual bool hasPendingActivity() const OVERRIDE;
     virtual void stop() OVERRIDE;
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE;
     virtual ExecutionContext* executionContext() const OVERRIDE;
 
     bool isClosePending() const { return m_closePending; }
     void forceClose();
     const IDBDatabaseMetadata& metadata() const { return m_metadata; }
-    void enqueueEvent(PassRefPtr<Event>);
+    void enqueueEvent(PassRefPtrWillBeRawPtr<Event>);
 
     using EventTarget::dispatchEvent;
-    virtual bool dispatchEvent(PassRefPtr<Event>) OVERRIDE;
+    virtual bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>) OVERRIDE;
 
     int64_t findObjectStoreId(const String& name) const;
     bool containsObjectStore(const String& name) const
     {
         return findObjectStoreId(name) != IDBObjectStoreMetadata::InvalidId;
     }
 
     blink::WebIDBDatabase* backend() const { return m_backend.get(); }
 
     static int64_t nextTransactionId();
@@ skipping 22 matching lines @@
     OwnPtr<blink::WebIDBDatabase> m_backend;
     RefPtr<IDBTransaction> m_versionChangeTransaction;
     typedef HashMap<int64_t, RefPtr<IDBTransaction> > TransactionMap;
     TransactionMap m_transactions;
 
     bool m_closePending;
     bool m_contextStopped;
 
     // Keep track of the versionchange events waiting to be fired on this
     // database so that we can cancel them if the database closes.
-    Vector<RefPtr<Event> > m_enqueuedEvents;
+    WillBePersistentHeapVector<RefPtrWillBeMember<Event> > m_enqueuedEvents;
 
     RefPtr<IDBDatabaseCallbacks> m_databaseCallbacks;
 };
 
 } // namespace WebCore
 
 #endif // IDBDatabase_h