Oilpan: Add support of pre-finalization callback to Oilpan infrastructure.

Source/modules/indexeddb/IDBPendingTransactionMonitor.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 13 matching lines @@
  */
 
 #ifndef IDBPendingTransactionMonitor_h
 #define IDBPendingTransactionMonitor_h
 
 #include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
-class IDBCursor;
-class IDBDisposerDispatcher;
-class IDBRequest;
 class IDBTransaction;
 
 // This class keeps track of the transactions created during the current
 // Javascript execution context. Transactions have an internal |active| flag
 // which is set to true on creation, but must be set to false when control
 // returns to the event loop.
-// Also, this class is responsible to call IDBRequest::dispose() before an
-// IDBRequest object dies, and responsible to call IDBCursor::dispose() before
-// an IDBCursor object dies.
-// FIXME: Rename the class name.
 class IDBPendingTransactionMonitor {
     WTF_MAKE_NONCOPYABLE(IDBPendingTransactionMonitor);
 
 public:
     IDBPendingTransactionMonitor();
-    ~IDBPendingTransactionMonitor();
 
     void addNewTransaction(IDBTransaction&);
     void deactivateNewTransactions();
-    void registerRequest(IDBRequest&);
-    // It's ok to call unregisterRequest(*this) inside
-    // IDBRequest::dispose(). But we must not call unregisterRequest() with
-    // an object different from |this| of IDBRequest::dispose().
-    void unregisterRequest(IDBRequest&);
-    void registerCursor(IDBCursor&);
-    // It's ok to call unregisterCursor(*this) inside IDBCursor::dispose(). But
-    // we must not call unregisterCursor() with an object different from |this|
-    // of IDBCursor::dispose().
-    void unregisterCursor(IDBCursor&);
 
 private:
     PersistentHeapVector<Member<IDBTransaction> > m_transactions;
-    RefPtr<IDBDisposerDispatcher> m_dispatcher;
 };
 
 } // namespace blink
 
 #endif // IDBPendingTransactionMonitor_h