Clean up forward declarations in Source/core/css

Source/core/css/CSSImportRule.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2008, 2012 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 CSSImportRule_h
 #define CSSImportRule_h
 
 #include "core/css/CSSRule.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
-class CSSStyleSheetResource;
 class MediaList;
-class MediaQuerySet;
 class StyleRuleImport;
 
 class CSSImportRule FINAL : public CSSRule {
 public:
     static PassRefPtrWillBeRawPtr<CSSImportRule> create(StyleRuleImport* rule, CSSStyleSheet* sheet)
     {
         return adoptRefWillBeNoop(new CSSImportRule(rule, sheet));
     }
 
     virtual ~CSSImportRule();
@@ skipping 14 matching lines @@
     RefPtrWillBeMember<StyleRuleImport> m_importRule;
     mutable RefPtrWillBeMember<MediaList> m_mediaCSSOMWrapper;
     mutable RefPtrWillBeMember<CSSStyleSheet> m_styleSheetCSSOMWrapper;
 };
 
 DEFINE_CSS_RULE_TYPE_CASTS(CSSImportRule, IMPORT_RULE);
 
 } // namespace blink
 
 #endif // CSSImportRule_h