include RefCounted.h where needed, only.

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007 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 StyleSheetList_h
 #define StyleSheetList_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/css/CSSStyleSheet.h"
 #include "core/dom/TreeScope.h"
+#include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class HTMLStyleElement;
 class StyleSheet;
 
 class StyleSheetList final : public GarbageCollected<StyleSheetList>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
@@ skipping 13 matching lines @@
 private:
     explicit StyleSheetList(TreeScope*);
     const HeapVector<Member<StyleSheet>>& styleSheets();
 
     Member<TreeScope> m_treeScope;
 };
 
 } // namespace blink
 
 #endif // StyleSheetList_h