Get absolute time from timers Independent of start()/stop()/getElapsedTime() functionality, getAbsoluteTime() is added to return the time regardless of whether the timer is running. Bug: angleproject:2908 Change-Id: I056aeb6eddfba8757a139934c1cf68e00e860de6 Reviewed-on: https://chromium-review.googlesource.com/c/1296952 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>