Update the incorrect units for two UMA stats.

From the codes, Ash.TouchView.TouchViewActiveTotal and
Ash.TouchView.TouchViewInactiveTotal are both recorded in mins, but they were
not documented correctly in histograms.xml. Thus update them.

Bug: None
Change-Id: I5003e015ff5d9101818501d340494acc6d034e3a
Reviewed-on: https://chromium-review.googlesource.com/c/1423133
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#624683}
1 file changed