Make Submit button on user pods unfocusable

ui/login/account_picker/user_pod_row.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 User pod row implementation.
  */
 
 cr.define('login', function() {
   /**
@@ skipping 71 matching lines @@
    * @const
    */
   var HELP_TOPIC_PUBLIC_SESSION = 3041033;
 
   /**
    * Tab order for user pods. Update these when adding new controls.
    * @enum {number}
    * @const
    */
   var UserPodTabOrder = {
-    POD_INPUT: 1,        // Password input field, Action box menu button, submit
-                         // button next to password input field and the pod
-                         // itself.
+    POD_INPUT: 1,        // Password input field, Action box menu button and
+                         // the pod itself.
     PIN_KEYBOARD: 2,     // Pin keyboard below the password input field.
     POD_CUSTOM_ICON: 3,  // Pod custom icon next to password input field.
     HEADER_BAR: 4,       // Buttons on the header bar (Shutdown, Add User).
     POD_MENU_ITEM: 5     // User pad menu items (User info, Remove user).
   };
 
   /**
    * Supported authentication types. Keep in sync with the enum in
    * chrome/browser/signin/screenlock_bridge.h
    * @enum {number}
@@ skipping 707 matching lines @@
       this.passwordElement.addEventListener('keypress',
           this.handlePasswordKeyPress_.bind(this));
       this.passwordElement.addEventListener('input',
           this.handleInputChanged_.bind(this));
       this.passwordElement.addEventListener('mouseup',
           this.handleInputMouseUp_.bind(this));
 
       if (this.submitButton) {
         this.submitButton.addEventListener('click',
             this.handleSubmitButtonClick_.bind(this));
-        this.submitButton.tabIndex = UserPodTabOrder.POD_INPUT;
       }
 
       this.imageElement.addEventListener('load',
           this.parentNode.handlePodImageLoad.bind(this.parentNode, this));
 
       var initialAuthType = this.user.initialAuthType ||
           AUTH_TYPE.OFFLINE_PASSWORD;
       this.setAuthType(initialAuthType, null);
 
       if (this.user.isActiveDirectory)
@@ skipping 3144 matching lines @@
        if (pod && pod.multiProfilesPolicyApplied) {
          pod.userTypeBubbleElement.classList.remove('bubble-shown');
        }
      }
   };
 
   return {
     PodRow: PodRow
   };
 });