Remove the ENABLE_SQL_DATABASE compile-time flag.

Source/WebCore/Modules/webdatabase/DatabaseThread.cpp

 /*
  * Copyright (C) 2007, 2008, 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 11 matching lines @@
  * (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.
  */
 
 #include "config.h"
 #include "DatabaseThread.h"
 
-#if ENABLE(SQL_DATABASE)
-
 #include "Database.h"
 #include "DatabaseTask.h"
 #include "Logging.h"
 #include "SQLTransactionClient.h"
 #include "SQLTransactionCoordinator.h"
 #include <wtf/AutodrainedPool.h>
 #include <wtf/UnusedParam.h>
 
 namespace WebCore {
 
@@ skipping 134 matching lines @@
 };
 
 void DatabaseThread::unscheduleDatabaseTasks(DatabaseBackend* database)
 {
     // Note that the thread loop is running, so some tasks for the database
     // may still be executed. This is unavoidable.
     SameDatabasePredicate predicate(database);
     m_queue.removeIf(predicate);
 }
 } // namespace WebCore
-#endif