Show username on password manager list tooltip

chrome/browser/resources/options/password_manager_list.js

 // Copyright (c) 2012 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.passwordManager', function() {
   /** @const */ var ArrayDataModel = cr.ui.ArrayDataModel;
   /** @const */ var DeletableItemList = options.DeletableItemList;
   /** @const */ var DeletableItem = options.DeletableItem;
   /** @const */ var List = cr.ui.List;
 
@@ skipping 38 matching lines @@
       // default favicon for the domain and that the URL has a scheme if none
       // is present in the password manager.
       urlLabel.style.backgroundImage = getFaviconImageSet(
           'origin/' + this.url, 16);
       this.contentElement.appendChild(urlLabel);
 
       // The stored username.
       var usernameLabel = this.ownerDocument.createElement('div');
       usernameLabel.className = 'name';
       usernameLabel.textContent = this.username;
+      usernameLabel.title = this.username;
       this.contentElement.appendChild(usernameLabel);
 
       // The stored password.
       var passwordInputDiv = this.ownerDocument.createElement('div');
       passwordInputDiv.className = 'password';
 
       // The password input field.
       var passwordInput = this.ownerDocument.createElement('input');
       passwordInput.type = 'password';
       passwordInput.className = 'inactive-password';
@@ skipping 264 matching lines @@
     },
   };
 
   return {
     PasswordListItem: PasswordListItem,
     PasswordExceptionsListItem: PasswordExceptionsListItem,
     PasswordsList: PasswordsList,
     PasswordExceptionsList: PasswordExceptionsList,
   };
 });