MD Settings: slight tweaks to when the metrics reporting restart button shows up

chrome/browser/resources/settings/privacy_page/privacy_page.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
  * 'settings-privacy-page' is the settings page containing privacy and
  * security settings.
  */
 Polymer({
@@ skipping 109 matching lines @@
     var browserProxy = settings.PrivacyPageBrowserProxyImpl.getInstance();
     var enabled = this.$.metricsReportingCheckbox.checked;
     browserProxy.setMetricsReportingEnabled(enabled);
   },
 
   /**
    * @param {!MetricsReporting} metricsReporting
    * @private
    */
   setMetricsReporting_: function(metricsReporting) {
-    if (this.metricsReporting_) {
-      // TODO(dbeam): hide if changed back to the value Chrome started with.
-      var changed = this.metricsReporting_.enabled != metricsReporting.enabled;
-      this.showRestart_ = changed && !this.metricsReporting_.managed;
+    // TODO(dbeam): remember whether metrics reporting was enabled when Chrome
+    // started.
+    if (metricsReporting.managed) {
+      this.showRestart_ = false;
+    } else if (this.metricsReporting_ &&
+               metricsReporting.enabled != this.metricsReporting_.enabled) {
+      this.showRestart_ = true;
     }
     this.metricsReporting_ = metricsReporting;
   },
 
   /** @private */
   onRestartTap_: function() {
     settings.LifetimeBrowserProxyImpl.getInstance().restart();
   },
 </if>
 
@@ skipping 15 matching lines @@
    * The sub-page title for the site or content settings.
    * @return {string}
    * @private
    */
   siteSettingsPageTitle_: function() {
     return loadTimeData.getBoolean('enableSiteSettings') ?
         loadTimeData.getString('siteSettings') :
         loadTimeData.getString('contentSettings');
   },
 });