tree ad2ca4a9870e6ae34bc594aa21e9ec0e9a4f3cab
parent a3600bd02d7579a04fbdc58f6ad17c95c2504284
author npm@chromium.org <npm@chromium.org> 1501013274 -0700
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1501048624 -0700

Implement Performance.timeOrigin

This CL adds performance.timeOrigin under an experimental flag. Definition:
https://www.w3.org/TR/hr-time-3/#dom-performance-timeorigin

The unix time for when the global monotonic clock is 0 is calculated at
the time when the first Performance object is created as the system time
minus the monotonic clock time.

This CL also adds a test for this attribute.

Bug: chromium:739277, chromium:747989
Change-Id: I5e8cf4e098615052bd5db35956dcfcdd7dd44b90
Reviewed-on: https://chromium-review.googlesource.com/583636
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Timothy Dresser <tdresser@chromium.org>
Cr-Commit-Position: refs/heads/master@{#489407}
WPT-Export-Revision: 0bc9296a02d294a00b00e362d1435ce599977446