Fixes keyboard event related bugs in switch person window.

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 1093 matching lines @@
 
     setPinVisibility: function(visible) {
       var elements = this.getElementsByClassName('pin-tag');
       for (var i = 0; i < elements.length; ++i)
         this.updatePinClass_(elements[i], visible);
       this.updatePinClass_(this, visible);
 
       // Set the focus to the input element after showing/hiding pin keyboard.
       if (visible)
         this.pinKeyboard.focus();
-      else
-        this.mainInput.focus();
     },
 
     isPinShown: function() {
       return this.classList.contains('pin-enabled');
     },
 
     setUserPodIconType: function(userTypeClass) {
       this.userTypeIconAreaElement.classList.add(userTypeClass);
       this.userTypeIconAreaElement.hidden = false;
     },
@@ skipping 2392 matching lines @@
        if (pod && pod.multiProfilesPolicyApplied) {
          pod.userTypeBubbleElement.classList.remove('bubble-shown');
        }
      }
   };
 
   return {
     PodRow: PodRow
   };
 });