Remove duplicated headers from modules/

Source/modules/webdatabase/DatabaseClient.cpp

 /*
  * Copyright (C) 2013 Google 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * 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 "DatabaseClient.h"
 
 #include "core/dom/Document.h"
-#include "core/workers/WorkerClients.h"
 #include "core/workers/WorkerGlobalScope.h"
 
 namespace WebCore {
 
 DatabaseClient* DatabaseClient::from(ExecutionContext* context)
 {
     if (context->isDocument()) {
         return static_cast<DatabaseClient*>(Supplement<Page>::from(toDocument(context)->page(), supplementName()));
     }
     ASSERT(context->isWorkerGlobalScope());
     return static_cast<DatabaseClient*>(Supplement<WorkerClients>::from(toWorkerGlobalScope(context)->clients(), supplementName()));
 }
 
 const char* DatabaseClient::supplementName()
 {
     return "DatabaseClient";
 }
 
 void provideDatabaseClientTo(Page* page, PassOwnPtr<DatabaseClient> client)
 {
     page->provideSupplement(DatabaseClient::supplementName(), client);
 }
 
 void provideDatabaseClientToWorker(WorkerClients* workerClients, PassOwnPtr<DatabaseClient> client)
 {
     workerClients->provideSupplement(DatabaseClient::supplementName(), client);
 }
 
 } // namespace WebCore