blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/dom/DOMImplementation.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 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.
@@ skipping 15 matching lines @@
 
 #include "core/CoreExport.h"
 #include "core/dom/Document.h"
 
 namespace blink {
 
 class Document;
 class DocumentInit;
 class DocumentType;
 class ExceptionState;
-class LocalFrame;
 class HTMLDocument;
-class KURL;
 class XMLDocument;
 
 class CORE_EXPORT DOMImplementation final
     : public GarbageCollected<DOMImplementation>,
       public ScriptWrappable {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static DOMImplementation* create(Document& document) {
     return new DOMImplementation(document);
@@ skipping 28 matching lines @@
 
  private:
   explicit DOMImplementation(Document&);
 
   Member<Document> m_document;
 };
 
 }  // namespace blink
 
 #endif  // DOMImplementation_h