Add cr-policy-network-indicator and add to internet settings

chrome/browser/resources/settings/policy_controllable/policy_controllable.js

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-/**
- * @fileoverview Behavior to determine whether a pref is controlled by policy.
- */
-
-/** @polymerBehavior */
-var PolicyControllable = {
-  /**
-   * @param {?chrome.settingsPrivate.PrefObject} pref
-   * @return {boolean} True if the pref is controlled by an enforced policy.
-   */
-  isPolicyControlled: function(pref) {
-    return !!pref &&
-            pref.policyEnforcement ==
-                chrome.settingsPrivate.PolicyEnforcement.ENFORCED;
-  },
-};