Added RefreshPolicies to PolicyService.

chrome/browser/resources/policy.js

 // Copyright (c) 2012 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.
 
 /**
  * This variable structure is here to document the structure that the template
  * expects to correctly populate the page.
  */
 var policyDataFormat = {
   // Whether any of the policies in 'policies' have a value.
   'anyPoliciesSet': true,
 
   // False if the policy information is being sent due to an initial page load
   // and true if it is being sent due to a change of policy values.
   'isPolicyUpdate': false,
+
+  // True if a policy fetch that was requested has completed.
+  'isRefreshDone': false,
+
   'policies': [
     {
       'level': 'managed',
       'name': 'AllowXYZ',
       'set': true,
       'scope': 'Machine',
       'status': 'ok',
       'value': true
     }
   ],
@@ skipping 183 matching lines @@
   Policy.requestData = function() {
     chrome.send('requestData');
   };
 
   /**
    * Called by the C++ PolicyUIHandler when it has the requested data.
    * @param {Object} policyData The policy information in the format described
    * by the policyDataFormat.
    */
   Policy.returnData = function(policyData) {
+    if (policyData.isRefreshDone)
+      $('fetch-policies-button').disabled = false;
     if (policyData.isPolicyUpdate) {
       Policy.getInstance().collapseExpandedCells();
       Policy.getInstance().renderTemplate(policyData);
       Policy.getInstance().updatePolicyVisibility();
-
-      $('fetch-policies-button').disabled = false;
     } else {
       Policy.getInstance().renderTemplate(policyData);
     }
   };
 
   /**
    * Asks the C++ PolicyUIHandler to re-fetch policy information.
    */
   Policy.triggerPolicyFetch = function() {
     chrome.send('fetchPolicy');
@@ skipping 34 matching lines @@
   // Export
   return {
     Policy: Policy
   };
 });
 
 var Policy = policies.Policy;
 
 // Get data and have it displayed upon loading.
 document.addEventListener('DOMContentLoaded', policies.Policy.initialize);