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diff --git a/Source/WebCore/css/CSSFontVariationValue.h b/Source/WebCore/css/CSSFontVariationValue.h
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+++ b/Source/WebCore/css/CSSFontVariationValue.h
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+/*
+ * Copyright (C) 2016 Apple 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
+ */
+
+#pragma once
+
+#if ENABLE(VARIATION_FONTS)
+
+#include "CSSValue.h"
+#include "FontTaggedSettings.h"
+
+namespace WebCore {
+
+class CSSFontVariationValue final : public CSSValue {
+public:
+    static Ref<CSSFontVariationValue> create(FontTag tag, float value)
+    {
+        return adoptRef(*new CSSFontVariationValue(tag, value));
+    }
+
+    const FontTag& tag() const { return m_tag; }
+    float value() const { return m_value; }
+    String customCSSText() const;
+
+    bool equals(const CSSFontVariationValue&) const;
+
+private:
+    CSSFontVariationValue(FontTag, float);
+
+    FontTag m_tag;
+    const float m_value;
+};
+
+} // namespace WebCore
+
+SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSFontVariationValue, isFontVariationValue())
+
+#endif // ENABLE(VARIATION_FONTS)