include RefCounted.h where needed, only.

third_party/WebKit/Source/core/css/StyleSheet.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2008, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef StyleSheet_h
 #define StyleSheet_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
-#include "wtf/RefCounted.h"
 
 namespace blink {
 
 class CSSRule;
 class KURL;
 class MediaList;
 class Node;
 class StyleSheet;
 
 class CORE_EXPORT StyleSheet : public GarbageCollectedFinalized<StyleSheet>, public ScriptWrappable {
@@ skipping 16 matching lines @@
     virtual KURL baseURL() const = 0;
     virtual bool isLoading() const = 0;
     virtual bool isCSSStyleSheet() const { return false; }
 
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 };
 
 } // namespace blink
 
 #endif