
I've assigned multiple slowest tests before and I feel it's convenient to add some logs. This cl adds log, which helps me answer questions like: * How long did it take to run the first 10000 tests? * How long did it wait to run this one test? I hope to check in this code. After this bug resolved, revert //testing/buildbot changes, but keep the //base/test changes for future debugging needs. Bug: 1203439 Change-Id: Ia41979a982de06e3bd158ba3a4f154edeca31d0b Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2878916 Reviewed-by: Yuke Liao <liaoyuke@chromium.org> Reviewed-by: danakj <danakj@chromium.org> Commit-Queue: Sven Zheng <svenzheng@chromium.org> Cr-Commit-Position: refs/heads/master@{#882229}