chromium/src/third_party/blink/renderer/core/frame/navigator_concurrent_hardware.idl

// Copyright 2014 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.

// https://html.spec.whatwg.org/C/#navigator.hardwareconcurrency

interface mixin NavigatorConcurrentHardware {
    [HighEntropy=Direct, MeasureAs=NavigatorHardwareConcurrency] readonly attribute unsigned long long hardwareConcurrency;
};