Cleanup: Extract icon related methods outside of util.js

chrome/browser/resources/options/home_page_overlay.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.
 
 cr.define('options', function() {
   /** @const */ var Page = cr.ui.pageManager.Page;
   /** @const */ var SettingsDialog = options.SettingsDialog;
 
   /**
    * HomePageOverlay class
@@ skipping 74 matching lines @@
       urlFieldIndicator.readOnly = event.value.value;
     },
 
     /**
      * Updates the background of the url field to show the favicon for the
      * URL that is currently typed in.
      * @private
      */
     updateFavicon_: function() {
       var urlField = $('homepage-url-field');
-      urlField.style.backgroundImage = getFaviconImageSet(urlField.value);
+      urlField.style.backgroundImage = cr.icon.getFaviconImageSet(
+          urlField.value);
     },
 
     /**
      * Sends an asynchronous request for new autocompletion suggestions for the
      * the given query. When new suggestions are available, the C++ handler will
      * call updateAutocompleteSuggestions_.
      * @param {string} query List of autocomplete suggestions.
      * @private
      */
     requestAutocompleteSuggestions_: function(query) {
@@ skipping 39 matching lines @@
   HomePageOverlay.updateAutocompleteSuggestions = function() {
     var instance = HomePageOverlay.getInstance();
     instance.updateAutocompleteSuggestions_.apply(instance, arguments);
   };
 
   // Export
   return {
     HomePageOverlay: HomePageOverlay
   };
 });