Submit button added to user pod.

ui/login/account_picker/screen_account_picker.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview Account picker screen implementation.
  */
 
 login.createScreen('AccountPickerScreen', 'account-picker', function() {
   /**
@@ skipping 159 matching lines @@
       if (loginAttempts > MAX_LOGIN_ATTEMPTS_IN_POD &&
           !activatedPod.user.supervisedUser) {
         chrome.send('maxIncorrectPasswordAttempts',
             [activatedPod.user.emailAddress]);
         activatedPod.showSigninUI();
       } else {
         if (loginAttempts == 1) {
           chrome.send('firstIncorrectPasswordAttempt',
               [activatedPod.user.emailAddress]);
         }
+        // Update the pod row display if incorrect password.
+        $('pod-row').setFocusedPodErrorDisplay(true);
         // We want bubble's arrow to point to the first letter of input.
         /** @const */ var BUBBLE_OFFSET = 7;
         /** @const */ var BUBBLE_PADDING = 4;
 
         // We want the bubble to point to where the input is after it is done
         // tranisitioning.
         var showBottomCallback = function() {
           activatedPod.removeEventListener("webkitTransitionEnd",
               showBottomCallback);
           $('bubble').showContentForElement(activatedPod.mainInput,
@@ skipping 221 matching lines @@
      * @param {string} userID The user ID of the public session
      * @param {string} locale The locale to which this list of keyboard layouts
      *     applies
      * @param {!Object} list List of available keyboard layouts
      */
     setPublicSessionKeyboardLayouts: function(userID, locale, list) {
       $('pod-row').setPublicSessionKeyboardLayouts(userID, locale, list);
     }
   };
 });