Remove the ENABLE_SQL_DATABASE compile-time flag.

Source/WebCore/Modules/webdatabase/DatabaseThread.h

 /*
  * Copyright (C) 2007, 2008 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 10 matching lines @@
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #ifndef DatabaseThread_h
 #define DatabaseThread_h
 
-#if ENABLE(SQL_DATABASE)
-
 #include <wtf/Deque.h>
 #include <wtf/HashMap.h>
 #include <wtf/HashSet.h>
 #include <wtf/MessageQueue.h>
 #include <wtf/OwnPtr.h>
 #include <wtf/PassOwnPtr.h>
 #include <wtf/PassRefPtr.h>
 #include <wtf/RefPtr.h>
 #include <wtf/Threading.h>
 
@@ skipping 42 matching lines @@
     typedef HashSet<RefPtr<DatabaseBackend> > DatabaseSet;
     DatabaseSet m_openDatabaseSet;
 
     OwnPtr<SQLTransactionClient> m_transactionClient;
     OwnPtr<SQLTransactionCoordinator> m_transactionCoordinator;
     DatabaseTaskSynchronizer* m_cleanupSync;
 };
 
 } // namespace WebCore
 
-#endif // ENABLE(SQL_DATABASE)
 #endif // DatabaseThread_h