Use svg icon to avoid lazy loading of Polymer elements for user pods

chrome/browser/resources/md_user_manager/user_manager_styles.html

 <link rel="import" href="chrome://md-user-manager/shared_styles.html">
 
 <dom-module id="user-manager-styles">
   <template>
     <style include="shared-styles">
       body {
         background-color: var(--paper-grey-200);
       }
 
       user-manager-pages,
@@ skipping 174 matching lines @@
         outline: 0;
       }
 
       .pod[auth-type='onlineSignIn'] .reauth-hint-container {
         flex-direction: row-reverse;
         margin: 0;
         padding: 10px;
       }
 
       .reauth-hint-container .reauth-warning {
-        --iron-icon-height: 20px;
-        --iron-icon-width: 20px;
+        -webkit-mask-size: 16px;
+        height: 20px;
+        width: 20px;
       }
 
       .action-box-area.active .action-box-button {
         display: none;
       }
 
       .action-box-area.active ~ .action-box-menu:not(.menu-moved-up) {
         top: 8px;
       }
 
@@ skipping 58 matching lines @@
           font-weight: 500;
         };
         border-radius: 2px;
         line-height: 32px;
         min-width: 72px;
         padding: 0 16px;
       }
     </style>
   </template>
 </dom-module>