It accumulate sample values inside it and provide API to calc
min/max/avg and percentiles. Current implementation will do it
in O(nlogn) time and planned to be used in the test code after
all time sensitive operations and also assume not too big amount
of data inside.
Bug: webrtc:10138
Change-Id: I262c4b9ca538c19463888b6d6bcdaa7e8c3caa68
Reviewed-on: https://webrtc-review.googlesource.com/c/116284
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26214}
