chromium/chrome/browser/ash/net/network_health/network_health_service_policy.json

[
  {
    // This is the selinux security context of ash chrome.
    "identity": "u:r:cros_browser:s0",
    "own": [
      "ChromiumNetworkDiagnosticsRoutines",
      "ChromiumNetworkHealth"
    ]
  },
  {
    "identity": "u:r:cros_healthd:s0",
    "request": [
      "ChromiumNetworkDiagnosticsRoutines",
      "ChromiumNetworkHealth"
    ]
  }
]