WebUI: Add cr-policy-pref-indicator tests

ui/webui/resources/cr_elements/policy/cr_policy_indicator_behavior.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 for policy controlled indicators.
  */
 
 /**
  * Strings required for policy indicators. These must be set at runtime.
@@ skipping 53 matching lines @@
       case CrPolicyIndicatorType.RECOMMENDED:
         icon = 'cr20:domain';
         break;
       default:
         assertNotReached();
     }
     return icon;
   },
 
   /**
-   * @param {CrPolicyIndicatorType} type
+   * @param {!CrPolicyIndicatorType} type
    * @param {string} name The name associated with the indicator. See
    *     chrome.settingsPrivate.PrefObject.controlledByName
    * @param {boolean=} opt_matches For RECOMMENDED only, whether the indicator
    *     value matches the recommended value.
    * @return {string} The tooltip text for |type|.
    */
   getPolicyIndicatorTooltip: function(type, name, opt_matches) {
     if (!CrPolicyStrings)
       return '';  // Tooltips may not be defined, e.g. in OOBE.
     switch (type) {
       case CrPolicyIndicatorType.PRIMARY_USER:
         return CrPolicyStrings.controlledSettingShared.replace('$1', name);
       case CrPolicyIndicatorType.OWNER:
         return CrPolicyStrings.controlledSettingOwner.replace('$1', name);
       case CrPolicyIndicatorType.USER_POLICY:
       case CrPolicyIndicatorType.DEVICE_POLICY:
         return CrPolicyStrings.controlledSettingPolicy;
       case CrPolicyIndicatorType.RECOMMENDED:
         return opt_matches ?
             CrPolicyStrings.controlledSettingRecommendedMatches :
             CrPolicyStrings.controlledSettingRecommendedDiffers;
     }
     return '';
   },
 };