Remove the CSS Properties API

third_party/WebKit/Source/core/css/properties/CSSPropertyFunctions.h

-// Copyright 2015 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 CSSPropertyFunctions_h
-#define CSSPropertyFunctions_h
-
-#include "core/CSSPropertyNames.h"
-#include "core/css/CSSValue.h"
-#include "wtf/PassRefPtr.h"
-
-namespace blink {
-
-class CSSParserContext;
-class CSSParserTokenRange;
-
-// The parent class for all properties that implement the CSSPropertyDescriptor API.
-// Contains static function signatures as a reference of what needs to be implemented
-// in the child classes.
-class CSSPropertyFunctions {
-    STATIC_ONLY(CSSPropertyFunctions);
-public:
-    static CSSPropertyID id();
-
-    // Consumes and parses a single value for this property from by the token range,
-    // returning the corresponding CSSValue. This function does not check for the end
-    // of the token range. Returns nullptr if the input is invalid.
-    static CSSValue* parseSingleValue(CSSParserTokenRange&, const CSSParserContext&);
-    using parseSingleValueFunction = decltype(&parseSingleValue);
-};
-
-} // namespace blink
-
-#endif // CSSPropertyFunctions_h