Cleanup: Extract icon related methods outside of util.js

chrome/browser/resources/settings/site_settings/site_settings_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 common to Site Settings classes.
  */
 
 /** @polymerBehavior */
 var SiteSettingsBehaviorImpl = {
@@ skipping 241 matching lines @@
   },
 
   /**
    * Returns the icon to use for a given site.
    * @param {SiteException} site The url of the site to fetch the icon for.
    * @return {string} The background-image style with the favicon.
    * @private
    */
   computeSiteIcon: function(site) {
     var url = this.ensureUrlHasScheme(site.originForDisplay);
-    return 'background-image: ' + getFaviconImageSet(url);
+    return 'background-image: ' + cr.icon.getFaviconImageSet(url);
   },
 };
 
 /** @polymerBehavior */
 var SiteSettingsBehavior = [SiteSettingsBehaviorImpl];