Decouple FileSystem and WebSQL callbacks from VoidCallback and it non-refcounted

Source/modules/webdatabase/SQLTransaction.h

 /*
  * Copyright (C) 2007, 2013 Apple 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 30 matching lines @@
 
 class AbstractSQLTransactionBackend;
 class Database;
 class ExceptionState;
 class SQLError;
 class SQLStatementCallback;
 class SQLStatementErrorCallback;
 class SQLTransactionCallback;
 class SQLTransactionErrorCallback;
 class SQLValue;
-class VoidCallback;
+class SQLVoidCallback;
 
 class SQLTransaction : public SQLTransactionStateMachine<SQLTransaction>, public AbstractSQLTransaction, public ScriptWrappable {
 public:
     static PassRefPtr<SQLTransaction> create(Database*, PassRefPtr<SQLTransactionCallback>,
-        PassRefPtr<VoidCallback> successCallback, PassRefPtr<SQLTransactionErrorCallback>,
+        PassRefPtr<SQLVoidCallback> successCallback, PassRefPtr<SQLTransactionErrorCallback>,
         bool readOnly);
 
     void performPendingCallback();
 
     void executeSQL(const String& sqlStatement, const Vector<SQLValue>& arguments,
         PassRefPtr<SQLStatementCallback>, PassRefPtr<SQLStatementErrorCallback>, ExceptionState&);
 
     Database* database() { return m_database.get(); }
 
 private:
     SQLTransaction(Database*, PassRefPtr<SQLTransactionCallback>,
-        PassRefPtr<VoidCallback> successCallback, PassRefPtr<SQLTransactionErrorCallback>,
+        PassRefPtr<SQLVoidCallback> successCallback, PassRefPtr<SQLTransactionErrorCallback>,
         bool readOnly);
 
     void clearCallbackWrappers();
 
     // APIs called from the backend published via AbstractSQLTransaction:
     virtual void requestTransitToState(SQLTransactionState) OVERRIDE;
     virtual bool hasCallback() const OVERRIDE;
     virtual bool hasSuccessCallback() const OVERRIDE;
     virtual bool hasErrorCallback() const OVERRIDE;
     virtual void setBackend(AbstractSQLTransactionBackend*) OVERRIDE;
@@ skipping 10 matching lines @@
     SQLTransactionState deliverSuccessCallback();
 
     SQLTransactionState unreachableState();
     SQLTransactionState sendToBackendState();
 
     SQLTransactionState nextStateForTransactionError();
 
     RefPtr<Database> m_database;
     RefPtr<AbstractSQLTransactionBackend> m_backend;
     SQLCallbackWrapper<SQLTransactionCallback> m_callbackWrapper;
-    SQLCallbackWrapper<VoidCallback> m_successCallbackWrapper;
+    SQLCallbackWrapper<SQLVoidCallback> m_successCallbackWrapper;
     SQLCallbackWrapper<SQLTransactionErrorCallback> m_errorCallbackWrapper;
 
     bool m_executeSqlAllowed;
     RefPtr<SQLError> m_transactionError;
 
     bool m_readOnly;
 };
 
 } // namespace WebCore
 
 #endif // SQLTransaction_h