This directory defines a mojo service, network_health.mojom, for requesting a snapshot of the network health state.
The implementation of the service lives in chrome/browser/chromeos/net/network_health/ because it has Chrome dependencies, e.g. for Captive Portal state.
The mojom lives here so that it is available to other components, e.g. as a WebUI component in ui/webui/resources/cr_components/chromeos/network_health/.