Remove the CSSOM.

sky/engine/core/css/RuleSet.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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 SKY_ENGINE_CORE_CSS_RULESET_H_
 #define SKY_ENGINE_CORE_CSS_RULESET_H_
 
-#include "sky/engine/core/css/CSSKeyframesRule.h"
 #include "sky/engine/core/css/MediaQueryEvaluator.h"
 #include "sky/engine/core/css/RuleFeature.h"
 #include "sky/engine/core/css/StyleRule.h"
+#include "sky/engine/core/css/StyleRuleKeyframes.h"
 #include "sky/engine/core/css/resolver/MediaQueryResult.h"
 #include "sky/engine/wtf/Forward.h"
 #include "sky/engine/wtf/HashMap.h"
 #include "sky/engine/wtf/LinkedStack.h"
 #include "sky/engine/wtf/TerminatedArray.h"
 
 namespace blink {
 
 enum AddRuleFlags {
     RuleHasNoSpecialState         = 0,
@@ skipping 126 matching lines @@
 #ifndef NDEBUG
     Vector<RuleData> m_allRules;
 #endif
 };
 
 } // namespace blink
 
 WTF_ALLOW_MOVE_AND_INIT_WITH_MEM_FUNCTIONS(blink::RuleData);
 
 #endif  // SKY_ENGINE_CORE_CSS_RULESET_H_