Make empty sign-in banner hidden to avoid blocking user removal button

ui/login/account_picker/md_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 3848 matching lines @@
         if (leftMargin > 0)
           nameArea.style.left = cr.ui.toCssPx(leftMargin);
         else {
           pod.nameElement.style.width = cr.ui.toCssPx(CROS_POD_WIDTH);
           nameArea.style.left = cr.ui.toCssPx(0);
         }
         // Update action box menu position to ensure it doesn't overlap with
         // elements outside the pod.
         var actionBoxMenu = pod.querySelector('.action-box-menu');
         var actionBoxButton = pod.querySelector('.action-box-button');
-        var MENU_TOP_PADDING = 7;
         actionBoxMenu.style.top =
-            cr.ui.toCssPx(actionBoxButton.offsetHeight + MENU_TOP_PADDING);
+            cr.ui.toCssPx(actionBoxButton.offsetHeight);
         if (this.isPortraitMode_() && pods.length > 1) {
           // Confine the menu inside the pod when it may overlap with outside
           // elements.
           actionBoxMenu.style.left = 'auto';
           actionBoxMenu.style.right = cr.ui.toCssPx(0);
         } else {
           actionBoxMenu.style.left = cr.ui.toCssPx(
               pod.nameElement.offsetWidth + actionBoxButton.style.marginLeft);
           actionBoxMenu.style.right = 'auto';
         }
@@ skipping 97 matching lines @@
      * Displays a banner containing |message|. If the banner is already present
      * this function updates the message in the banner.
      * The positioning of the banner is handled by handleAfterPodPlacement_()
      * becuase it dynamically depends on the pod positions.
      * @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);
+      $('signin-banner-container1').hidden = banner.textContent.length == 0;
     },
 
     /**
      * Whether the pod is currently focused.
      * @param {UserPod} pod Pod to check for focus.
      * @return {boolean} Pod focus status.
      */
     isFocused: function(pod) {
       return this.focusedPod_ == pod;
     },
@@ skipping 501 matching lines @@
       if (pod && pod.multiProfilesPolicyApplied) {
         pod.userTypeBubbleElement.classList.remove('bubble-shown');
       }
     }
   };
 
   return {
     PodRow: PodRow
   };
 });