Remove the CSSOM.

sky/engine/core/css/parser/CSSGrammar.y

 %{
 
 /*
  *  Copyright (C) 2002-2003 Lars Knoll (knoll@kde.org)
  *  Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  *  Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *  Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  *  Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser 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
  *  Lesser General Public License for more details.
  *
  *  You should have received a copy of the GNU Lesser General Public
  *  License along with this library; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  *
  */
 
 #include "config.h"
 
 #include "CSSPropertyNames.h"
-#include "core/css/CSSKeyframeRule.h"
-#include "core/css/CSSKeyframesRule.h"
-#include "core/css/parser/BisonCSSParser.h"
-#include "core/css/parser/CSSParserMode.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/CSSSelector.h"
 #include "core/css/CSSSelectorList.h"
 #include "core/css/MediaList.h"
 #include "core/css/MediaQueryExp.h"
+#include "core/css/StyleKeyframe.h"
 #include "core/css/StyleRule.h"
+#include "core/css/StyleRuleKeyframes.h"
 #include "core/css/StyleSheetContents.h"
+#include "core/css/parser/BisonCSSParser.h"
+#include "core/css/parser/CSSParserMode.h"
 #include "core/dom/Document.h"
+#include "sky/engine/core/css/MediaList.h"
 #include "wtf/FastMalloc.h"
 #include <stdlib.h>
 #include <string.h>
 
 using namespace blink;
 
 #define YYMALLOC fastMalloc
 #define YYFREE fastFree
 
 #define YYENABLE_NLS 0
@@ skipping 1439 matching lines @@
     ;
 
 rule_error_recovery:
     /* empty */
   | rule_error_recovery error
   | rule_error_recovery invalid_square_brackets_block
   | rule_error_recovery invalid_parentheses_block
     ;
 
 %%