Disable ability to show passwords when running in Metro.

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 259 matching lines @@
     /**
      * Listener for changes on the preference.
      * @param {Event} event The preference update event.
      * @private
      */
     onPreferenceChanged_: function(event) {
       this.showPasswords_ = event.value.value;
       this.redraw();
     },
 
+    /**
+     * Removes the show password button. This is called by the backend when
+     * we are running in an environment that does not support showing
+     * passwords, such as Windows Metro
+     */
+    disableShowPassword: function() {
+      this.showPasswords_ = false;
+      this.redraw();
+    },
+
     /** @override */
     createItem: function(entry) {
       return new PasswordListItem(this.dataModel, entry, this.showPasswords_);
     },
 
     /** @override */
     deleteItemAtIndex: function(index) {
       var item = this.dataModel.item(index);
       if (item && item.length > 3) {
         // The fourth element, if present, is the original index to delete.
@@ skipping 38 matching lines @@
     },
   };
 
   return {
     PasswordListItem: PasswordListItem,
     PasswordExceptionsListItem: PasswordExceptionsListItem,
     PasswordsList: PasswordsList,
     PasswordExceptionsList: PasswordExceptionsList,
   };
 });