Handle the PasswordManagerAllowShowPasswords preference in the options webui.

chrome/browser/resources/options/password_manager_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.passwordManager', function() {
   const ArrayDataModel = cr.ui.ArrayDataModel;
   const DeletableItemList = options.DeletableItemList;
   const DeletableItem = options.DeletableItem;
   const List = cr.ui.List;
 
   /**
    * Creates a new passwords list item.
    * @param {Array} entry An array of the form [url, username, password].
    * @constructor
    * @extends {cr.ui.ListItem}
    */
-  function PasswordListItem(entry) {
+  function PasswordListItem(entry, showPasswords) {
     var el = cr.doc.createElement('div');
     el.dataItem = entry;
     el.__proto__ = PasswordListItem.prototype;
-    el.decorate();
+    el.decorate(showPasswords);
 
     return el;
   }
 
   PasswordListItem.prototype = {
     __proto__: DeletableItem.prototype,
 
     /** @inheritDoc */
-    decorate: function() {
+    decorate: function(showPasswords) {
       DeletableItem.prototype.decorate.call(this);
 
       // The URL of the site.
       var urlLabel = this.ownerDocument.createElement('div');
       urlLabel.classList.add('favicon-cell');
       urlLabel.classList.add('url');
       urlLabel.textContent = this.url;
       urlLabel.style.backgroundImage = url('chrome://favicon/' + this.url);
       this.contentElement.appendChild(urlLabel);
 
       // The stored username.
       var usernameLabel = this.ownerDocument.createElement('div');
       usernameLabel.className = 'name';
       usernameLabel.textContent = 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';
       passwordInput.readOnly = true;
       passwordInput.value = this.password;
       passwordInputDiv.appendChild(passwordInput);
 
       // The show/hide button.
-      var button = this.ownerDocument.createElement('button');
-      button.classList.add('hidden');
-      button.classList.add('password-button');
-      button.textContent = localStrings.getString('passwordShowButton');
-      button.addEventListener('click', this.onClick_, true);
-      passwordInputDiv.appendChild(button);
+      if (showPasswords) {
+        var button = this.ownerDocument.createElement('button');
+        button.classList.add('hidden');
+        button.classList.add('password-button');
+        button.textContent = localStrings.getString('passwordShowButton');
+        button.addEventListener('click', this.onClick_, true);
+        passwordInputDiv.appendChild(button);
+      }
 
       this.contentElement.appendChild(passwordInputDiv);
     },
 
     /** @inheritDoc */
     selectionChanged: function() {
       var passwordInput = this.querySelector('input[type=password]');
       var textInput = this.querySelector('input[type=text]');
       var input = passwordInput || textInput;
       var button = input.nextSibling;
+      // button doesn't exist when passwords can't be shown.
+      if (!button)
+        return;
       if (this.selected) {
         input.classList.remove('inactive-password');
         button.classList.remove('hidden');
       } else {
         input.classList.add('inactive-password');
         button.classList.add('hidden');
       }
     },
 
     /**
@@ skipping 96 matching lines @@
   /**
    * Create a new passwords list.
    * @constructor
    * @extends {cr.ui.List}
    */
   var PasswordsList = cr.ui.define('list');
 
   PasswordsList.prototype = {
     __proto__: DeletableItemList.prototype,
 
+    /**
+     * Whether passwords can be revealed or not.
+     * @type {boolean}
+     * @private
+     */
+    showPasswords_: true,
+
     /** @inheritDoc */
-    createItem: function(entry) {
-      return new PasswordListItem(entry);
+    decorate: function() {
+      DeletableItemList.prototype.decorate.call(this);
+      Preferences.getInstance().addEventListener(
+          "profile.password_manager_allow_show_passwords",
+          this.onPreferenceChanged_.bind(this));
+    },
+
+    /**
+     * Listener for changes on the preference.
+     * @param {Event} event The preference update event.
+     * @private
+     */
+    onPreferenceChanged_: function(event) {
+      this.showPasswords_ = event.value.value;
+      this.redraw();
     },
 
     /** @inheritDoc */
+    createItem: function(entry) {
+      return new PasswordListItem(entry, this.showPasswords_);
+    },
+
+    /** @inheritDoc */
     deleteItemAtIndex: function(index) {
       PasswordManager.removeSavedPassword(index);
     },
 
     /**
      * The length of the list.
      */
     get length() {
       return this.dataModel.length;
     },
@@ skipping 27 matching lines @@
     },
   };
 
   return {
     PasswordListItem: PasswordListItem,
     PasswordExceptionsListItem: PasswordExceptionsListItem,
     PasswordsList: PasswordsList,
     PasswordExceptionsList: PasswordExceptionsList,
   };
 });