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

ui/login/account_picker/user_pod_template.html

-<!-- Polymer is lazily-loaded inside of user_pod_template.js -->
-
 <div id="user-pod-template" class="pod" hidden>
   <div class="user-image-pane">
     <div class="user-image-container">
       <img class="user-image" alt>
     </div>
     <div class="signed-in-indicator" i18n-content="signedIn"></div>
     <div class="indicator-container">
       <div class="indicator legacy-supervised-indicator"></div>
       <div class="indicator child-indicator"></div>
       <div class="indicator locked-indicator"></div>
@@ skipping 21 matching lines @@
       <!-- User Click Authentication -->
       <div class="password-label"></div>
       <div class="signin-transition-container">
         <span class="signing-in-label" i18n-content="signingIn"></span>
         <span class="animated-ellipsis-component0">.</span>
         <span class="animated-ellipsis-component1">.</span>
         <span class="animated-ellipsis-component2">.</span>
       </div>
       <div class="custom-icon-container" hidden></div>
       <div class="reauth-hint-container">
-        <iron-icon icon="warning" class="reauth-warning"></iron-icon>
+        <span class="reauth-warning"></span>
         <span class="reauth-name-hint"></span>
       </div>
       <div class="launch-app-button-container" hidden>
         <button class="launch-app-button" i18n-content="launchAppButton">
         </button>
       </div>
     </div>
   </div>
   <div class="action-box-area">
     <div class="custom-appearance action-box-button"></div>
-    <iron-icon icon="more-vert" class="action-box-icon"></iron-icon>
+    <!-- iron-icon is imported inside user_manager.html -->
+    <iron-icon icon="cr:more-vert" class="action-box-icon"></iron-icon>
   </div>
   <div class="user-image-gradient-area">
   </div>
   <div class="user-type-icon-area" hidden>
     <div class="custom-appearance user-type-icon-image"></div>
   </div>
   <div class="action-box-menu">
     <div class="action-box-menu-title">
       <span class="action-box-menu-title-name"></span>
       <span class="action-box-menu-title-email"></span>
@@ skipping 27 matching lines @@
           <tr>
             <td i18n-content="removeUserWarningTextSettings"></td>
             <td class="action-box-remove-user-warning-settings
                        action-box-remove-user-warning-table-numbers"
                 i18n-content="removeUserWarningTextCalculating"></td>
           </tr>
         </tbody>
       </table>
       <div class="action-box-remove-legacy-supervised-user-warning-text"
           i18n-content="removeLegacySupervisedUserWarningText"></div>
+      <!-- paper-button is imported inside user_manager.html -->
       <paper-button class="remove-warning-button"
           i18n-content="removeUserWarningButtonTitle"></paper-button>
     </div>
   </div>
   <div class="user-type-bubble">
     <div class="user-type-bubble-header">
       <span class="mp-policy-title"
           i18n-content="multiProfilesRestrictedPolicyTitle"></span>
     </div>
     <div class="user-type-bubble-body">
@@ skipping 45 matching lines @@
              i18n-content="publicSessionLanguageAndInput"></a>
         </div>
         <button class="enter-button"
                 i18n-content="publicAccountEnter"
                 i18n-values="aria-label:publicAccountEnterAccessibleName">
         </button>
       </div>
     </div>
   </div>
 </div>