Update modules classes to use OVERRIDE / FINAL when needed

Source/modules/webdatabase/SQLTransactionBackend.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 38 matching lines @@
 
 class SQLTransactionWrapper : public ThreadSafeRefCounted<SQLTransactionWrapper> {
 public:
     virtual ~SQLTransactionWrapper() { }
     virtual bool performPreflight(SQLTransactionBackend*) = 0;
     virtual bool performPostflight(SQLTransactionBackend*) = 0;
     virtual SQLError* sqlError() const = 0;
     virtual void handleCommitFailedAfterPostflight(SQLTransactionBackend*) = 0;
 };
 
-class SQLTransactionBackend : public SQLTransactionStateMachine<SQLTransactionBackend>, public AbstractSQLTransactionBackend {
+class SQLTransactionBackend FINAL : public SQLTransactionStateMachine<SQLTransactionBackend>, public AbstractSQLTransactionBackend {
 public:
     static PassRefPtr<SQLTransactionBackend> create(DatabaseBackend*,
         PassRefPtr<AbstractSQLTransaction>, PassRefPtr<SQLTransactionWrapper>, bool readOnly);
 
     virtual ~SQLTransactionBackend();
 
     void lockAcquired();
     void performNextStep();
 
     DatabaseBackend* database() { return m_database.get(); }
@@ skipping 55 matching lines @@
 
     Mutex m_statementMutex;
     Deque<RefPtr<SQLStatementBackend> > m_statementQueue;
 
     OwnPtr<SQLiteTransaction> m_sqliteTransaction;
 };
 
 } // namespace WebCore
 
 #endif // SQLTransactionBackend_h