Carrying from the discussion on https://chromium-review.googlesource.com/c/chromium/src/+/729476:

The 'homeProvider' property was added to chromeosInfoPrivate API to allow the HelpApp to show carrier-specific information. See the original bugs for details:

  https://code.google.com/archive/p/chromium-os/issues/13505
  https://code.google.com/archive/p/chromium-os/issues/17483

Currently, the 'homeProvider' property is set to something like '<MNO name> (<country abbrev.>)' (e.g. "T-Mobile (us)"). The value isn't necessarily stable (e.g. the MNO name may change over time) or accurate (i.e. the country abbrev can be misleading in case of roaming, MVNO, etc). Previous usages of the 'homeProvider' property included some hard-coded values, which were fragile.

Given that the use of the 'homeProvider' property in the HelpApp was later removed in https://chrome-internal-review.googlesource.com/149961. <chromiumos>/platform/chromeos-assets/helpapp no longer references to the 'homeProvider' property. Given that it's a private extension API, only whitelisted apps can use it. There is currently no user of the 'homeProvider' property, so we can safely remove it from the chromeosInfoPrivate API.