Remove unused includes from various .cpp files in core/

Source/core/workers/DedicatedWorkerContext.cpp

 /*
  * Copyright (C) 2009 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 "core/workers/DedicatedWorkerContext.h"
 
-#include "core/dom/MessageEvent.h"
 #include "core/page/DOMWindow.h"
 #include "core/workers/DedicatedWorkerThread.h"
 #include "core/workers/WorkerObjectProxy.h"
 
 namespace WebCore {
 
 PassRefPtr<DedicatedWorkerContext> DedicatedWorkerContext::create(const KURL& url, const String& userAgent, PassOwnPtr<GroupSettings> settings, DedicatedWorkerThread* thread, const String& contentSecurityPolicy, ContentSecurityPolicy::HeaderType contentSecurityPolicyType, PassRefPtr<SecurityOrigin> topOrigin)
 {
     RefPtr<DedicatedWorkerContext> context = adoptRef(new DedicatedWorkerContext(url, userAgent, settings, thread, topOrigin));
     context->applyContentSecurityPolicyFromString(contentSecurityPolicy, contentSecurityPolicyType);
@@ skipping 29 matching lines @@
     Base::importScripts(urls, ec);
     thread()->workerObjectProxy().reportPendingActivity(hasPendingActivity());
 }
 
 DedicatedWorkerThread* DedicatedWorkerContext::thread()
 {
     return static_cast<DedicatedWorkerThread*>(Base::thread());
 }
 
 } // namespace WebCore