merge_pr_18071
Source: https://github.com/tidoust/reffy-reports/blob/52f31b9/whatwg/idl/performance-timeline.idl Build: https://travis-ci.org/tidoust/reffy-reports/builds/563479802
Source: https://github.com/tidoust/reffy-reports/blob/52f31b9/whatwg/idl/performance-timeline.idl Build: https://travis-ci.org/tidoust/reffy-reports/builds/563479802