tree c66fda4597e33edf054b657681a39bc146e72ee2
parent b8333799325294b81f8553640f64ca11c7bf7af9
author kjharland <kjharland@google.com> 1543391767 -0800
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1543599475 +0000

[fxtime] Add Stopwatch interface

This is used in infra/infra/tilo to measure invocation and test
run times.

IN-597 #comment

Change-Id: I52ef9636085f510a9707acf84808115202d3c5a3