Add device policy to disallow shutdown - ash UI modifications

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() {
   /**
    * Creates a header bar element.
    *
    * @constructor
    * @extends {HTMLDivElement}
    */
   var HeaderBar = cr.ui.define('div');
 
   HeaderBar.prototype = {
     __proto__: HTMLDivElement.prototype,
 
     // Whether guest button should be shown when header bar is in normal mode.
     showGuest_: false,
 
+    // Whether the reboot button should be shown the when header bar is in
+    // normal mode.
+    showReboot_: false,
+
+    // Whether the shutdown button should be shown when the header bar is in
+    // normal mode.
+    showShutdown_: true,
+
     // Current UI state of the sign-in screen.
     signinUIState_: SIGNIN_UI_STATE.HIDDEN,
 
     // Whether to show kiosk apps menu.
     hasApps_: false,
 
     /** @override */
     decorate: function() {
       $('shutdown-header-bar-item').addEventListener('click',
           this.handleShutdownClick_);
       $('shutdown-button').addEventListener('click',
           this.handleShutdownClick_);
+      $('restart-header-bar-item').addEventListener('click',
+          this.handleRestartClick_);
+      $('restart-button').addEventListener('click',
+          this.handleRestartClick_);
       $('add-user-button').addEventListener('click',
           this.handleAddUserClick_);
       $('cancel-add-user-button').addEventListener('click',
           this.handleCancelAddUserClick_);
       $('guest-user-header-bar-item').addEventListener('click',
           this.handleGuestClick_);
       $('guest-user-button').addEventListener('click',
           this.handleGuestClick_);
       $('sign-out-user-button').addEventListener('click',
           this.handleSignoutClick_);
@@ skipping 94 matching lines @@
      * Shutdown button click handler.
      *
      * @private
      */
     handleShutdownClick_: function(e) {
       chrome.send('shutdownSystem');
       e.stopPropagation();
     },
 
     /**
+     * Restart button click handler.
+     *
+     * @private
+     */
+    handleRestartClick_: function(e) {
+      chrome.send('restartSystem');

[stevenjb, 2014/12/17 19:09:02]

I think that this should also just call 'shutdownOrRestartSystem' and update the
label based on policy, rather than permitting a UI bug to attempt to do the
wrong thing.

+      e.stopPropagation();
+    },
+
+    /**
      * Cancel user adding button handler.
      *
      * @private
      */
     handleCancelMultipleSignInClick_: function(e) {
       chrome.send('cancelUserAdding');
       e.stopPropagation();
     },
 
     /**
@@ skipping 10 matching lines @@
      * If true then "Browse as Guest" button is shown.
      *
      * @type {boolean}
      */
     set showGuestButton(value) {
       this.showGuest_ = value;
       this.updateUI_();
     },
 
     /**
+     * If true the "Restart" button is shown.
+     *
+     * @type {boolean}
+     */
+    set showRebootButton(value) {
+      this.showReboot_ = value;
+      this.updateUI_();
+    },
+
+    /**
+     * If true the "Shutdown" button is shown.
+     *
+     * @type {boolean}
+     */
+    set showShutdownButton(value) {
+      this.showShutdown_ = value;
+      this.updateUI_();
+    },
+
+    /**
      * Current header bar UI / sign in state.
      *
      * @type {number} state Current state of the sign-in screen (see
      *       SIGNIN_UI_STATE).
      */
     get signinUIState() {
       return this.signinUIState_;
     },
     set signinUIState(state) {
       this.signinUIState_ = state;
@@ skipping 48 matching lines @@
       $('cancel-add-user-button').hidden = accountPickerIsActive ||
           !this.allowCancel_ ||
           wrongHWIDWarningIsActive ||
           isMultiProfilesUI;
       $('guest-user-header-bar-item').hidden = gaiaIsActive ||
           supervisedUserCreationDialogIsActive ||
           !this.showGuest_ ||
           wrongHWIDWarningIsActive ||
           isSamlPasswordConfirm ||
           isMultiProfilesUI;
+      $('restart-header-bar-item').hidden = !this.showReboot_;
+      $('shutdown-header-bar-item').hidden = !this.showShutdown_;
       $('sign-out-user-item').hidden = !isLockScreen;
 
       $('add-user-header-bar-item').hidden =
           $('add-user-button').hidden && $('cancel-add-user-button').hidden;
       $('apps-header-bar-item').hidden = !this.hasApps_ ||
           (!gaiaIsActive && !accountPickerIsActive);
       $('cancel-multiple-sign-in-item').hidden = !isMultiProfilesUI;
       $('cancel-consumer-management-enrollment').hidden =
           !isEnrollingConsumerManagement;
 
@@ skipping 63 matching lines @@
    * Convenience wrapper of animateIn.
    */
   HeaderBar.animateIn = function(callback) {
     $('login-header-bar').animateIn(callback);
   };
 
   return {
     HeaderBar: HeaderBar
   };
 });