Fix ChromeOS users list multiple X problem.

chrome/browser/resources/options/chromeos_accounts_user_list.js

 // Copyright (c) 2010 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.
 
 cr.define('options.accounts', function() {
   const List = cr.ui.List;
   const ListItem = cr.ui.ListItem;
   const ArrayDataModel = cr.ui.ArrayDataModel;
 
   /**
@@ skipping 85 matching lines @@
     /**
      * Handles the clicks on the list and triggers user removal if the click
      * is on the remove user button.
      * @private
      * @param {!Event} e The click event object.
      */
     handleClick_: function(e) {
       // Handle left button click
       if (e.button == 0) {
         var el = e.target;
-        if (el.className == 'remove-user-button') {
+        if (el.classList.contains('remove-user-button')) {
           this.removeUser(el.parentNode.user);
         }
       }
     },
 
     /**
      * Loads given user list.
      * @param {Array} users An array of user object.
      */
     load_: function(users) {
@@ skipping 49 matching lines @@
       var labelEmail = this.ownerDocument.createElement('span');
       labelEmail.className = 'user-email-label';
       labelEmail.textContent = this.user.email;
 
       var labelName = this.ownerDocument.createElement('span');
       labelName.className = 'user-name-label';
       labelName.textContent = this.user.owner ?
           localStrings.getStringF('username_format', this.user.name) :
           this.user.name;
 
+      var emailNameBlock = this.ownerDocument.createElement('div');
+      emailNameBlock.className = 'user-email-name-block';
+      emailNameBlock.appendChild(labelEmail);
+      emailNameBlock.appendChild(labelName);
+      emailNameBlock.title = this.user.owner ?
+          localStrings.getStringF('username_format', this.user.email) :
+          this.user.email;
+
       this.appendChild(icon);
-      this.appendChild(labelEmail);
-      this.appendChild(labelName);
+      this.appendChild(emailNameBlock);
 
       if (!this.user.owner) {
         var removeButton = this.ownerDocument.createElement('button');
-        removeButton.className = 'remove-user-button';
+        removeButton.classList.add('raw-button');
+        removeButton.classList.add('remove-user-button');
         this.appendChild(removeButton);
       }
     }
   };
 
   return {
     UserList: UserList
   };
 });