include RefCounted.h where needed, only.

third_party/WebKit/Source/modules/plugins/DOMMimeTypeArray.h

 /*
     Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
     Copyright (C) 2008 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 DOMMimeTypeArray_h
 #define DOMMimeTypeArray_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/frame/DOMWindowProperty.h"
 #include "modules/plugins/DOMMimeType.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
 
 namespace blink {
 
 class LocalFrame;
 class PluginData;
 
 class DOMMimeTypeArray final : public GarbageCollected<DOMMimeTypeArray>, public ScriptWrappable, public DOMWindowProperty {
     DEFINE_WRAPPERTYPEINFO();
     USING_GARBAGE_COLLECTED_MIXIN(DOMMimeTypeArray);
 public:
     static DOMMimeTypeArray* create(LocalFrame* frame)
     {
         return new DOMMimeTypeArray(frame);
     }
 
     unsigned length() const;
     DOMMimeType* item(unsigned index);
     DOMMimeType* namedItem(const AtomicString& propertyName);
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit DOMMimeTypeArray(LocalFrame*);
     PluginData* getPluginData() const;
 };
 
 } // namespace blink
 
 #endif // DOMMimeTypeArray_h