Remove unused includes from core/{editing,fileapi,history,html}

Source/core/html/shadow/PickerIndicatorElement.h

 /*
  * Copyright (C) 2012 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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef PickerIndicatorElement_h
 #define PickerIndicatorElement_h
 
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
 #include "core/html/HTMLDivElement.h"
 #include "core/platform/DateTimeChooser.h"
 #include "core/platform/DateTimeChooserClient.h"
-#include <wtf/OwnPtr.h>
 
 namespace WebCore {
 
 class HTMLInputElement;
 class PagePopup;
 
 class PickerIndicatorElement FINAL : public HTMLDivElement, public DateTimeChooserClient {
 public:
     // PickerIndicatorOwner implementer must call removePickerIndicatorOwner when
     // it doesn't handle event, e.g. at destruction.
@@ skipping 31 matching lines @@
 
 inline PickerIndicatorElement* toPickerIndicatorElement(Element* element)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!element || element->isPickerIndicatorElement());
     return static_cast<PickerIndicatorElement*>(element);
 }
 
 }
 #endif
 #endif