The code added in system_monitor_wmi_refresher.cc in https://chromium-review.googlesource.com/c/chromium/src/+/1340373 assumes that the WMI provider won't stop working at runtime, i.e. once the refresher has been properly configured and started it'll run its |Refresh| function at regular interval.

This could be flaky if the WMI server suddenly stop accepting our request, in which case the refresh timer should maybe be stopped or maybe we should try to re-establish the connection.