include RefCounted.h where needed, only.

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

 /*
  * Copyright (C) 2010. Adam Barth. 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 14 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef DocumentWriter_h
 #define DocumentWriter_h
 
 #include "core/html/parser/ParserSynchronizationPolicy.h"
 #include "core/loader/TextResourceDecoderBuilder.h"
 #include "platform/heap/Handle.h"
-#include "wtf/RefCounted.h"
-#include "wtf/text/WTFString.h"
+#include "wtf/Forward.h"
 
 namespace blink {
 
 class Document;
 class DocumentParser;
 
 class DocumentWriter final : public GarbageCollectedFinalized<DocumentWriter> {
     WTF_MAKE_NONCOPYABLE(DocumentWriter);
 public:
     static DocumentWriter* create(Document*, ParserSynchronizationPolicy, const AtomicString& mimeType, const AtomicString& encoding);
@@ skipping 18 matching lines @@
 
     Member<Document> m_document;
     TextResourceDecoderBuilder m_decoderBuilder;
 
     Member<DocumentParser> m_parser;
 };
 
 } // namespace blink
 
 #endif // DocumentWriter_h