Add CSS support for font-variation-settings

third_party/WebKit/Source/core/css/CSSFontVariationValue.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CSSFontVariationValue_h
+#define CSSFontVariationValue_h
+
+#include "core/css/CSSValue.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class CSSFontVariationValue : public CSSValue {
+ public:
+  static CSSFontVariationValue* create(const AtomicString& tag, float value) {
+    return new CSSFontVariationValue(tag, value);
+  }
+
+  const AtomicString& tag() const { return m_tag; }
+  float value() const { return m_value; }
+  String customCSSText() const;
+
+  bool equals(const CSSFontVariationValue&) const;
+
+  DEFINE_INLINE_TRACE_AFTER_DISPATCH() {
+    CSSValue::traceAfterDispatch(visitor);
+  }
+
+ private:
+  CSSFontVariationValue(const AtomicString& tag, float value);
+
+  AtomicString m_tag;
+  const float m_value;
+};
+
+DEFINE_CSS_VALUE_TYPE_CASTS(CSSFontVariationValue, isFontVariationValue());
+
+}  // namespace blink
+
+#endif