Remove even more @keyframes related code.

sky/engine/core/css/StyleRule.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2008, 2012, 2013 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 18 matching lines @@
 namespace blink {
 
 class StylePropertySet;
 
 class StyleRuleBase : public RefCounted<StyleRuleBase> {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     enum Type {
         Unknown, // Not used.
         Style,
-        FontFace = 4,
-        Keyframes = 5,
-        Supports = 12,
+        FontFace,
+        Supports,
     };
 
     Type type() const { return static_cast<Type>(m_type); }
 
     bool isFontFaceRule() const { return type() == FontFace; }
-    bool isKeyframesRule() const { return type() == Keyframes; }
     bool isStyleRule() const { return type() == Style; }
     bool isSupportsRule() const { return type() == Supports; }
 
     void deref()
     {
         if (derefBase())
             destroy();
     }
 
 protected:
@@ skipping 80 matching lines @@
 #define DEFINE_STYLE_RULE_TYPE_CASTS(Type) \
     DEFINE_TYPE_CASTS(StyleRule##Type, StyleRuleBase, rule, rule->is##Type##Rule(), rule.is##Type##Rule())
 
 DEFINE_TYPE_CASTS(StyleRule, StyleRuleBase, rule, rule->isStyleRule(), rule.isStyleRule());
 DEFINE_STYLE_RULE_TYPE_CASTS(FontFace);
 DEFINE_STYLE_RULE_TYPE_CASTS(Supports);
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_CSS_STYLERULE_H_