GitLab

Switches latency_perftests to use PerfResultReporter instead of
PrintResult and whitelists it for conversion to histograms before
uploading to the perf dashboard.

Shouldn't affect anything on the bots since these tests seem to
currently only be used for local testing.

Bug: 923564
Change-Id: I0386ad93c65e6bb79928f0f9c4fe4a2d27d9716e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1793790Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697400}