Use real metric data for calculating significant changes.
Use real metric data for calculating significant changes.

This cl uses the data parsed in filter.js to calculate which metrics
have had statistically significant changes between two runs and displays the
results.

Bug: chromium:866423
Change-Id: I5c70369a70a2f902f83547e181d7351ed398b93f
Reviewed-on: https://chromium-review.googlesource.com/1184920
Commit-Queue: Anthony Alridge <a645992b9bc8e5e2c65dfde706a199cd04747be0@google.com>
Reviewed-by: Mythri Alle <8217f39113e9154bc3569f26a6f1ff5840cea8d8@chromium.org>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult