include RefCounted.h where needed, only.

third_party/WebKit/Source/core/loader/HistoryItem.h

 /*
  * Copyright (C) 2006, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Research In Motion Limited. 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 16 matching lines @@
 #ifndef HistoryItem_h
 #define HistoryItem_h
 
 #include "bindings/core/v8/SerializedScriptValue.h"
 #include "core/CoreExport.h"
 #include "core/loader/FrameLoaderTypes.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/IntPoint.h"
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/Referrer.h"
-#include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class Document;
 class DocumentState;
 class EncodedFormData;
 class KURL;
 class ResourceRequest;
 
@@ skipping 86 matching lines @@
 
     // info used to repost form data
     RefPtr<EncodedFormData> m_formData;
     AtomicString m_formContentType;
 
 }; // class HistoryItem
 
 } // namespace blink
 
 #endif // HISTORYITEM_H