Remove unused includes from various .cpp files in core/

Source/core/page/DeviceController.cpp

 /*
  * Copyright 2010, The Android Open Source Project
  * Copyright (C) 2012 Samsung Electronics. 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
@@ skipping 11 matching lines @@
  * 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/page/DeviceController.h"
 
 #include "core/dom/Document.h"
 #include "core/page/DeviceClient.h"
-#include "core/page/Page.h"
 
 namespace WebCore {
 
 DeviceController::DeviceController(DeviceClient* client)
     : m_client(client)
     , m_timer(this, &DeviceController::fireDeviceEvent)
 {
     ASSERT(m_client);
 }
 
@@ skipping 52 matching lines @@
     m_lastEventListeners.clear();
     for (size_t i = 0; i < listenerVector.size(); ++i) {
         if (listenerVector[i]->document()
             && !listenerVector[i]->document()->activeDOMObjectsAreSuspended()
             && !listenerVector[i]->document()->activeDOMObjectsAreStopped())
         listenerVector[i]->dispatchEvent(getLastEvent());
     }
 }
 
 } // namespace WebCore