include RefCounted.h where needed, only.

third_party/WebKit/Source/core/testing/PrivateScriptTest.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PrivateScriptTest_h
 #define PrivateScriptTest_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
-#include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class Document;
 
 class PrivateScriptTest final : public GarbageCollectedFinalized<PrivateScriptTest>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PrivateScriptTest* create(Document* document)
     {
         return new PrivateScriptTest(document);
     }
 
     int addIntegerImplementedInCPPForPrivateScriptOnly(int value1, int value2);
     String stringAttributeImplementedInCPPForPrivateScriptOnly();
     void setStringAttributeImplementedInCPPForPrivateScriptOnly(String);
 
     DEFINE_INLINE_TRACE() { }
 
 private:
     explicit PrivateScriptTest(Document*);
 
     String m_stringAttributeImplementedInCPPForPrivateSriptOnly;
 };
 
 } // namespace blink
 
 #endif // PrivateScriptTest_h