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

ui/webui/resources/cr_elements/policy/cr_policy_pref_indicator.js

Index: ui/webui/resources/cr_elements/policy/cr_policy_pref_indicator.js
diff --git a/ui/webui/resources/cr_elements/policy/cr_policy_pref_indicator.js b/ui/webui/resources/cr_elements/policy/cr_policy_pref_indicator.js
index 99d5b082bfc9361578d1fadeae1497f88e8da27f..547757cad0eb197b82e4d648d036052c9d38799b 100644
--- a/ui/webui/resources/cr_elements/policy/cr_policy_pref_indicator.js
+++ b/ui/webui/resources/cr_elements/policy/cr_policy_pref_indicator.js
@@ -12,12 +12,7 @@ Polymer({
   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).
@@ -35,6 +30,13 @@ Polymer({
       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,
   },
 
   /**