chromium/third_party/blink/renderer/core/timing/epoch_time_stamp.idl

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// https://www.w3.org/TR/hr-time-3/#the-epochtimestamp-typedef

typedef unsigned long long EpochTimeStamp;