Variance calculation isn't currently used but overflow checks there may cause unnecessary crash. Instead of completely deleting useful feature it's now easy to disable it by choosing an appropriate Counter class. Bug: None Change-Id: Ifa8bbf2d023553504caa768e08e59ebccfb2fbb4 Reviewed-on: https://webrtc-review.googlesource.com/99561 Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24699}