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

Source/core/html/track/TextTrackCue.h

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2012, 2013 Apple 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.
@@ skipping 17 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef TextTrackCue_h
 #define TextTrackCue_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/dom/EventTarget.h"
 #include "core/html/HTMLDivElement.h"
-#include "core/html/HTMLElement.h"
-#include "core/html/track/TextTrack.h"
-#include <wtf/PassOwnPtr.h>
-#include <wtf/RefCounted.h>
+#include "wtf/RefCounted.h"
 
 namespace WebCore {
 
 class DocumentFragment;
 class ScriptExecutionContext;
 class TextTrack;
 class TextTrackCue;
 
 // ----------------------------
 
@@ skipping 223 matching lines @@
 
     std::pair<float, float> m_displayPosition;
 #if ENABLE(WEBVTT_REGIONS)
     String m_regionId;
 #endif
 };
 
 } // namespace WebCore
 
 #endif