Cleanup: Extract icon related methods outside of util.js

chrome/browser/resources/options/supervised_user_list.js

Index: chrome/browser/resources/options/supervised_user_list.js
diff --git a/chrome/browser/resources/options/supervised_user_list.js b/chrome/browser/resources/options/supervised_user_list.js
index 2777a3659a977ad4084ad0a25f33866a5d20b3c0..40e9a1c1e74577581e1c40c39e1611a4b3408570 100644
--- a/chrome/browser/resources/options/supervised_user_list.js
+++ b/chrome/browser/resources/options/supervised_user_list.js
@@ -63,7 +63,8 @@ cr.define('options.supervisedUserOptions', function() {
       // Add the avatar.
       var iconElement = this.ownerDocument.createElement('img');
       iconElement.className = 'profile-img';
-      iconElement.style.content = getProfileAvatarIcon(supervisedUser.iconURL);
+      iconElement.style.content = cr.icon.getProfileAvatarIcon(
+          supervisedUser.iconURL);
       this.appendChild(iconElement);
 
       // Add the profile name.