Remove the ENABLE_SQL_DATABASE compile-time flag.

Source/WebCore/Modules/webdatabase/DatabaseBackendBase.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 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.
@@ skipping 12 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.
  */
 
 #ifndef DatabaseBackendBase_h
 #define DatabaseBackendBase_h
 
-#if ENABLE(SQL_DATABASE)
-
 #include "DatabaseBasicTypes.h"
 #include "DatabaseDetails.h"
 #include "DatabaseError.h"
 #include "SQLiteDatabase.h"
 #include <wtf/Forward.h>
 #include <wtf/RefPtr.h>
 #include <wtf/ThreadSafeRefCounted.h>
 #include <wtf/text/WTFString.h>
 
 #if !LOG_DISABLED || !ERROR_DISABLED
@@ skipping 110 matching lines @@
 
     SQLiteDatabase m_sqliteDatabase;
 
     RefPtr<DatabaseAuthorizer> m_databaseAuthorizer;
 
     friend class DatabaseServer;
 };
 
 } // namespace WebCore
 
-#endif // ENABLE(SQL_DATABASE)
-
 #endif // DatabaseBackendBase_h