Remove the CSSOM.

sky/engine/core/css/CSSSupportsRule.h

Index: sky/engine/core/css/CSSSupportsRule.h
diff --git a/sky/engine/core/css/CSSSupportsRule.h b/sky/engine/core/css/CSSSupportsRule.h
deleted file mode 100644
index cd2955e388da5652f4d8c42ffc47fa983a6ef955..0000000000000000000000000000000000000000
--- a/sky/engine/core/css/CSSSupportsRule.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/* Copyright (C) 2012 Motorola Mobility Inc. 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.
- * 3. Neither the name of Motorola Mobility Inc. nor the names of its
- *    contributors may be used to endorse or promote products derived from this
- *    software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "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
- * OWNER OR CONTRIBUTORS 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_CSSSUPPORTSRULE_H_
-#define SKY_ENGINE_CORE_CSS_CSSSUPPORTSRULE_H_
-
-#include "sky/engine/core/css/CSSGroupingRule.h"
-
-namespace blink {
-
-class CSSRule;
-class StyleRuleSupports;
-
-class CSSSupportsRule final : public CSSGroupingRule {
-public:
-    static PassRefPtr<CSSSupportsRule> create(StyleRuleSupports* rule, CSSStyleSheet* sheet)
-    {
-        return adoptRef(new CSSSupportsRule(rule, sheet));
-    }
-
-    virtual ~CSSSupportsRule() { }
-
-    virtual CSSRule::Type type() const override { return SUPPORTS_RULE; }
-    virtual String cssText() const override;
-
-    String conditionText() const;
-
-private:
-    CSSSupportsRule(StyleRuleSupports*, CSSStyleSheet*);
-};
-
-DEFINE_CSS_RULE_TYPE_CASTS(CSSSupportsRule, SUPPORTS_RULE);
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_CORE_CSS_CSSSUPPORTSRULE_H_