Remove the CSSOM.

sky/engine/core/css/CSSFilterRule.h

Index: sky/engine/core/css/CSSFilterRule.h
diff --git a/sky/engine/core/css/CSSFilterRule.h b/sky/engine/core/css/CSSFilterRule.h
deleted file mode 100644
index a42e99f4d06fd46406935cfadf30d0abd43d0eb4..0000000000000000000000000000000000000000
--- a/sky/engine/core/css/CSSFilterRule.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above
- *    copyright notice, this list of conditions and the following
- *    disclaimer.
- * 2. Redistributions in binary form must reproduce the above
- *    copyright notice, this list of conditions and the following
- *    disclaimer in the documentation and/or other materials
- *    provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
- * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
- * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef SKY_ENGINE_CORE_CSS_CSSFILTERRULE_H_
-#define SKY_ENGINE_CORE_CSS_CSSFILTERRULE_H_
-
-#include "sky/engine/core/css/CSSRule.h"
-
-namespace blink {
-
-class CSSStyleDeclaration;
-class StyleRuleFilter;
-class StyleRuleCSSStyleDeclaration;
-
-class CSSFilterRule final : public CSSRule {
-public:
-    static PassRefPtr<CSSFilterRule> create(StyleRuleFilter* rule, CSSStyleSheet* sheet)
-    {
-        return adoptRef(new CSSFilterRule(rule, sheet));
-    }
-
-    virtual ~CSSFilterRule();
-
-    virtual CSSRule::Type type() const override { return WEBKIT_FILTER_RULE; }
-    virtual String cssText() const override;
-    virtual void reattach(StyleRuleBase*) override;
-
-    CSSStyleDeclaration* style() const;
-
-private:
-    CSSFilterRule(StyleRuleFilter*, CSSStyleSheet* parent);
-
-    RefPtr<StyleRuleFilter> m_filterRule;
-    mutable RefPtr<StyleRuleCSSStyleDeclaration> m_propertiesCSSOMWrapper;
-};
-
-DEFINE_CSS_RULE_TYPE_CASTS(CSSFilterRule, WEBKIT_FILTER_RULE);
-
-}
-
-
-#endif  // SKY_ENGINE_CORE_CSS_CSSFILTERRULE_H_