Three dot menu is shown now on WebView start screen.

chrome/browser/resources/chromeos/login/header_bar.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.
 
 /**
  * @fileoverview Login UI header bar implementation.
  */
 
 cr.define('login', function() {
   /**
@@ skipping 129 matching lines @@
     handleAddUserClick_: function(e) {
       Oobe.showSigninUI();
       // Prevent further propagation of click event. Otherwise, the click event
       // handler of document object will set wallpaper to user's wallpaper when
       // there is only one existing user. See http://crbug.com/166477
       e.stopPropagation();
     },
 
     handleMoreSettingsClick_: function(e) {
       this.isMoreSettingsActive = !this.isMoreSettingsActive;
+      this.addSupervisedUserMenu.focus();
       e.stopPropagation();
     },
 
     handleClick_: function(e) {
       this.isMoreSettingsActive = false;
     },
 
     handleAddSupervisedUserClick_: function(e) {
       chrome.send('showSupervisedUserCreationScreen');
       e.preventDefault();
     },
+
     /**
      * Cancel add user button click handler.
      *
      * @private
      */
     handleCancelAddUserClick_: function(e) {
       // Let screen handle cancel itself if that is capable of doing so.
       if (Oobe.getInstance().currentScreen &&
           Oobe.getInstance().currentScreen.cancel) {
         Oobe.getInstance().currentScreen.cancel();
@@ skipping 151 matching lines @@
       var isEnrollingConsumerManagement = (this.signinUIState_ ==
           SIGNIN_UI_STATE.CONSUMER_MANAGEMENT_ENROLLMENT);
       var isMultiProfilesUI =
           (Oobe.getInstance().displayType == DISPLAY_TYPE.USER_ADDING);
       var isLockScreen =
           (Oobe.getInstance().displayType == DISPLAY_TYPE.LOCK);
 
       $('add-user-button').hidden =
           !accountPickerIsActive || isMultiProfilesUI || isLockScreen;
       $('more-settings-header-bar-item').hidden = !this.isMinuteMaid_ ||
-          !gaiaIsActive ||
-          !this.showCreateSupervised_;
+          !this.showCreateSupervised_ ||
+          !accountPickerIsActive;
       $('cancel-add-user-button').hidden =
           (gaiaIsActive && this.isMinuteMaid_) ||
           accountPickerIsActive ||
           !this.allowCancel_ ||
           wrongHWIDWarningIsActive ||
           isMultiProfilesUI;
       $('guest-user-header-bar-item').hidden =
           (gaiaIsActive && !this.isMinuteMaid_) ||
           supervisedUserCreationDialogIsActive ||
           !this.showGuest_ ||
@@ skipping 80 matching lines @@
    * Convenience wrapper of animateIn.
    */
   HeaderBar.animateIn = function(fast, callback) {
     $('login-header-bar').animateIn(fast, callback);
   };
 
   return {
     HeaderBar: HeaderBar
   };
 });