WebUI: Add cr-policy-pref-indicator tests

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 5526eb54d0eaef62e5056b4c1d63994bf6a4478b..b90b0de1eb65270649e07c4835cc6dd04b6716c1 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
@@ -23,7 +23,7 @@ Polymer({
      * Which indicator type to show (or NONE).
      * @type {CrPolicyIndicatorType}

[michaelpg, 2017/02/15 02:02:11]

@private?

[stevenjb, 2017/02/15 02:23:29]

Done.

      */
-    indicatorType: {
+    indicatorType_: {
       type: String,
       value: CrPolicyIndicatorType.NONE,
       computed: 'getIndicatorType(pref.controlledBy, pref.enforcement)',
@@ -32,20 +32,19 @@ Polymer({
 
   /**
    * @param {CrPolicyIndicatorType} type
-   * @param {!chrome.settingsPrivate.PrefObject} pref
    * @return {string} The tooltip text for |type|.
    * @private
    */
-  getTooltip_: function(type, pref) {
-    var matches = pref && pref.value == pref.recommendedValue;
+  getTooltip_: function(type) {
+    var matches = !!this.pref && this.pref.value == this.pref.recommendedValue;
     return this.getPolicyIndicatorTooltip(
-        type, pref.controlledByName || '', matches);
+        type, this.pref.controlledByName || '', matches);
   },
 
   /**
    * @return {boolean} Whether the policy indicator is on. Useful for testing.
    */
   isActive: function() {
-    return this.isIndicatorVisible(this.indicatorType);
+    return this.isIndicatorVisible(this.indicatorType_);
   },
 });