Remove unused includes from various .cpp files in core/

Source/core/workers/WorkerEventQueue.cpp

 /*
  * Copyright (C) 2010 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:
  * 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
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (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 "core/workers/WorkerEventQueue.h"
 
-#include "core/dom/Document.h"
 #include "core/dom/Event.h"
-#include "core/dom/EventNames.h"
 #include "core/dom/ScriptExecutionContext.h"
-#include "core/page/DOMWindow.h"
 
 namespace WebCore {
 
 PassOwnPtr<WorkerEventQueue> WorkerEventQueue::create(ScriptExecutionContext* context)
 {
     return adoptPtr(new WorkerEventQueue(context));
 }
 
 WorkerEventQueue::WorkerEventQueue(ScriptExecutionContext* context)
     : m_scriptExecutionContext(context)
@@ skipping 82 matching lines @@
 {
     m_isClosed = true;
     for (EventTaskMap::iterator it = m_eventTaskMap.begin(); it != m_eventTaskMap.end(); ++it) {
         EventDispatcherTask* task = it->value;
         task->cancel();
     }
     m_eventTaskMap.clear();
 }
 
 }