Remove dead StyleRuleFilter.

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 24 matching lines @@
     WTF_MAKE_FAST_ALLOCATED;
 public:
     enum Type {
         Unknown, // Not used.
         Style,
         Media,
         FontFace = 4,
         Keyframes = 5,
         Keyframe, // Not used. These are internally non-rule StyleKeyframe objects.
         Supports = 12,
-        Filter = 17
     };
 
     Type type() const { return static_cast<Type>(m_type); }
 
     bool isFontFaceRule() const { return type() == FontFace; }
     bool isKeyframesRule() const { return type() == Keyframes; }
     bool isMediaRule() const { return type() == Media; }
     bool isStyleRule() const { return type() == Style; }
     bool isSupportsRule() const { return type() == Supports; }
-    bool isFilterRule() const { return type() == Filter; }
 
     void deref()
     {
         if (derefBase())
             destroy();
     }
 
 protected:
     StyleRuleBase(Type type) : m_type(type) { }
 
@@ skipping 84 matching lines @@
     String conditionText() const { return m_conditionText; }
     bool conditionIsSupported() const { return m_conditionIsSupported; }
 
 private:
     StyleRuleSupports(const String& conditionText, bool conditionIsSupported, Vector<RefPtr<StyleRuleBase> >& adoptRules);
 
     String m_conditionText;
     bool m_conditionIsSupported;
 };
 
-class StyleRuleFilter final : public StyleRuleBase {
-    WTF_MAKE_NONCOPYABLE(StyleRuleFilter);
-public:
-    static PassRefPtr<StyleRuleFilter> create(const String& filterName) { return adoptRef(new StyleRuleFilter(filterName)); }
-
-    ~StyleRuleFilter();
-
-    const String& filterName() const { return m_filterName; }
-
-    const StylePropertySet& properties() const { return *m_properties; }
-
-    void setProperties(PassRefPtr<StylePropertySet>);
-
-private:
-    StyleRuleFilter(const String&);
-
-    String m_filterName;
-    RefPtr<StylePropertySet> m_properties;
-};
-
 #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(Media);
 DEFINE_STYLE_RULE_TYPE_CASTS(Supports);
-DEFINE_STYLE_RULE_TYPE_CASTS(Filter);
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_CSS_STYLERULE_H_