MD Settings: add an aria-label to control indicators (often policy)

ui/webui/resources/cr_elements/policy/cr_policy_pref_indicator.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 Polymer element for indicating policies that apply to an
  * element controlling a settings preference.
  */
 Polymer({
   is: 'cr-policy-pref-indicator',
 
   behaviors: [CrPolicyIndicatorBehavior],
 
   properties: {
-    /**
-     * Optional preference object associated with the indicator. Initialized to
-     * null so that computed functions will get called if this is never set.
-     * @type {!chrome.settingsPrivate.PrefObject|undefined}
-     */
-    pref: Object,
+    iconAriaLabel: String,
 
     /**
      * Which indicator type to show (or NONE).
      * @type {CrPolicyIndicatorType}
      * @override
      */
     indicatorType: {
       type: String,
       value: CrPolicyIndicatorType.NONE,
       computed: 'getIndicatorTypeForPref_(pref.controlledBy, pref.enforcement)',
     },
 
     /** @override */
     indicatorTooltip: {
       type: String,
       computed: 'getIndicatorTooltipForPref_(indicatorType, pref.*)',
     },
+
+    /**
+     * Optional preference object associated with the indicator. Initialized to
+     * null so that computed functions will get called if this is never set.
+     * @type {!chrome.settingsPrivate.PrefObject|undefined}
+     */
+    pref: Object,
   },
 
   /**
    * @param {!chrome.settingsPrivate.ControlledBy|undefined} controlledBy
    * @param {!chrome.settingsPrivate.Enforcement|undefined} enforcement
    * @return {CrPolicyIndicatorType} The indicator type based on |controlledBy|
    *     and |enforcement|.
    */
   getIndicatorTypeForPref_: function(controlledBy, enforcement) {
     if (enforcement == chrome.settingsPrivate.Enforcement.RECOMMENDED)
@@ skipping 19 matching lines @@
    * @param {CrPolicyIndicatorType} indicatorType
    * @return {string} The tooltip text for |indicatorType|.
    * @private
    */
   getIndicatorTooltipForPref_: function(indicatorType) {
     var matches = this.pref && this.pref.value == this.pref.recommendedValue;
     return this.getIndicatorTooltip(
         indicatorType, this.pref.controlledByName || '', matches);
   },
 });