Handling edge cases of new login screen

ui/login/account_picker/md_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 53 matching lines @@
     },
 
     /** @override */
     getPreferredSize: function() {
       return {width: this.preferredWidth_, height: this.preferredHeight_};
     },
 
     /** @override */
     onWindowResize: function() {
       $('pod-row').onWindowResize();
-
-      // Reposition the error bubble, if it is showing. Since we are just
-      // moving the bubble, the number of login attempts tried doesn't matter.
-      var errorBubble = $('bubble');
-      if (errorBubble && !errorBubble.hidden)
-        this.showErrorBubble(0, undefined  /* Reuses the existing message. */);
     },
 
     /**
      * Sets preferred size for account picker screen.
      */
     setPreferredSize: function(width, height) {
       this.preferredWidth_ = width;
       this.preferredHeight_ = height;
     },
 
@@ skipping 265 matching lines @@
       $('pod-row').removeUserPod(username);
     },
 
     /**
      * Displays a banner containing |message|. If the banner is already present
      * this function updates the message in the banner. This function is used
      * by the chrome.screenlockPrivate.showMessage API.
      * @param {string} message Text to be displayed or empty to hide the banner.
      */
     showBannerMessage: function(message) {
-      var banner = $('signin-banner');
-      banner.textContent = message;
-      banner.classList.toggle('message-set', !!message);
+      $('pod-row').showBannerMessage(message);
     },
 
     /**
      * Shows a custom icon in the user pod of |username|. This function
      * is used by the chrome.screenlockPrivate API.
      * @param {string} username Username of pod to add button
      * @param {!{id: !string,
      *           hardlockOnClick: boolean,
      *           isTrialRun: boolean,
      *           tooltip: ({text: string, autoshow: boolean} | undefined)}} icon
@@ skipping 130 matching lines @@
         return;
       }
       chrome.send('setLockScreenAppsState',
                   [LOCK_SCREEN_APPS_STATE.FOREGROUND]);
 
       event.preventDefault();
       event.stopPropagation();
     },
   };
 });