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

Source/core/html/track/TextTrack.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011, 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:
  * 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 12 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 TextTrack_h
 #define TextTrack_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/html/track/TrackBase.h"
-#include <wtf/PassOwnPtr.h>
-#include <wtf/RefCounted.h>
-#include <wtf/text/WTFString.h>
+#include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class HTMLMediaElement;
 class TextTrack;
 class TextTrackCue;
 class TextTrackCueList;
 #if ENABLE(WEBVTT_REGIONS)
 class TextTrackRegion;
 class TextTrackRegionList;
@@ skipping 118 matching lines @@
     TextTrackType m_trackType;
     ReadinessState m_readinessState;
     int m_trackIndex;
     int m_renderedTrackIndex;
     bool m_hasBeenConfigured;
 };
 
 } // namespace WebCore
 
 #endif