third_party/WebKit/Source/core/css/PropertyRegistration.idl

// 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.

partial interface CSS {
    [RuntimeEnabled=CSSVariables2, CallWith=ExecutionContext, RaisesException]
        static void registerProperty(PropertyDescriptor descriptor);
};