Bug 1523810 - Add a policy for disabling captive portal support. r=Felipe,flod

Differential Revision: https://phabricator.services.mozilla.com/D18007

--HG--
extra : moz-landing-system : lando

browser/components/enterprisepolicies/Policies.jsm

@@ -133,6 +133,12 @@ var Policies = {
     },
   },
 
+  "CaptivePortal": {
+    onBeforeAddons(manager, param) {
+      setAndLockPref("network.captive-portal-service.enabled", param);
+    },
+  },
+
   "Certificates": {
     onBeforeAddons(manager, param) {
       if ("ImportEnterpriseRoots" in param) {

browser/components/enterprisepolicies/schemas/policies-schema.json

@@ -88,6 +88,10 @@
       }
     },
 
+    "CaptivePortal": {
+      "type": "boolean"
+    },
+
     "Certificates": {
       "type": "object",
       "properties": {

browser/components/enterprisepolicies/tests/browser/browser_policies_simple_pref_policies.js

@@ -224,6 +224,16 @@ const POLICIES_TESTS = [
       "security.tls.version.max": 4,
     },
   },
+
+  // POLICY: CaptivePortal
+  {
+    policies: {
+      "CaptivePortal": false,
+    },
+    lockedPrefs: {
+      "network.captive-portal-service.enabled": false,
+    },
+  },
 ];
 
 add_task(async function test_policy_remember_passwords() {

browser/locales/en-US/browser/policies/policies-descriptions.ftl

@@ -23,6 +23,8 @@ policy-BlockAboutSupport = Block access to the about:support page.
 
 policy-Bookmarks = Create bookmarks in the Bookmarks toolbar, Bookmarks menu, or a specified folder inside them.
 
+policy-CaptivePortal = Enable or disable captive portal support.
+
 policy-CertificatesDescription = Add certificates or use built-in certificates.
 
 policy-Cookies = Allow or deny websites to set cookies.