The TaskQueueSelector.TaskServicedPerSelectorLogic enumeration histogram is being incremented so frequently that it sometimes overflows the 31-bit sample count and rolls negative.  Desktop does uploads about every 30 minutes (and resets the counters) so whatever events these are, it's happening on the order of 1M times per second on some occasions.

https://uma.googleplex.com/p/chrome/histograms/?endDate=latest&dayCount=28&histograms=TaskQueueSelector.TaskServicedPerSelectorLogic%2CUMA.NegativeSamples.Histogram&fixupData=true&showMax=true&filters=isofficial%2Ceq%2CTrue&implicitFilters=isofficial