Remove duplicated headers from modules/

Source/modules/webdatabase/SQLTransactionCoordinator.cpp

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 16 matching lines @@
  * 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 "modules/webdatabase/SQLTransactionCoordinator.h"
 
 #include "modules/webdatabase/DatabaseBackend.h"
 #include "modules/webdatabase/SQLTransactionBackend.h"
-#include "wtf/Deque.h"
-#include "wtf/HashMap.h"
-#include "wtf/HashSet.h"
-#include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 static String getDatabaseIdentifier(SQLTransactionBackend* transaction)
 {
     DatabaseBackend* database = transaction->database();
     ASSERT(database);
     return database->stringIdentifier();
 }
 
@@ skipping 90 matching lines @@
             RefPtr<SQLTransactionBackend> transaction = info.pendingTransactions.first();
             transaction->notifyDatabaseThreadIsShuttingDown();
         }
     }
 
     // Clean up all pending transactions for all databases
     m_coordinationInfoMap.clear();
 }
 
 } // namespace WebCore