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

ui/login/account_picker/user_pod_template.html

Index: ui/login/account_picker/user_pod_template.html
diff --git a/ui/login/account_picker/user_pod_template.html b/ui/login/account_picker/user_pod_template.html
index 008b28c80dfe5c98812876ae121e254da1e414a3..6a5c0105caa37b7529a98db956f4204e69f743f1 100644
--- a/ui/login/account_picker/user_pod_template.html
+++ b/ui/login/account_picker/user_pod_template.html
@@ -1,5 +1,3 @@
-<!-- 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">
@@ -41,7 +39,7 @@
       </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>
@@ -52,7 +50,8 @@
   </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>
@@ -100,6 +99,7 @@
       </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>