New method was added to console spec [1].
This CL implements it.

[1] https://console.spec.whatwg.org/#timelog

R=dgozman@chromium.org,yangguo@chromium.org

Bug: chromium:854474
Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ie5f249795979bb886cf824ae9f950c5ef78ce04d
Reviewed-on: https://chromium-review.googlesource.com/1247641
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56294}