ChromeOS: Show the new POD RE-AUTH ICON when users needs to re-auth

ui/login/account_picker/user_pod_template.html

+<link rel="import" href="chrome://resources/polymer/core-icons/core-icons.html">
+
 <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>
     </div>
   </div>
   <div class="main-pane">
     <div class="name-container">
-      <div class="name"></div>
+      <div class="name-box">
+        <core-icon icon="warning" class="reauth-warning"></core-icon>

[dzhioev (left Google), 2015/06/23 00:02:09]

Note: if https://codereview.chromium.org/1179323005/ landed before this CL,
<core-icon> would need to be renamed to <iron-icon>.

+        <span class="name"></span>
+      </div>
       <div class="learn-more-container">
         <div class="learn-more"></div>
       </div>
     </div>
     <div class="auth-container">
       <!-- Password Authentication -->
       <div class="password-entry-container">
         <div class="password-container">
           <input type="password" class="password"
                  i18n-values="placeholder:passwordHint">
@@ skipping 99 matching lines @@
              i18n-content="publicSessionLanguageAndInput"></a>
         </div>
         <button class="enter-button"
                 i18n-content="publicAccountEnter"
                 i18n-values="aria-label:publicAccountEnterAccessibleName">
         </button>
       </div>
     </div>
   </div>
 </div>