MD User Manager: Display error message when all profiles are locked.

chrome/browser/resources/md_user_manager/user_manager.js

Index: chrome/browser/resources/md_user_manager/user_manager.js
diff --git a/chrome/browser/resources/md_user_manager/user_manager.js b/chrome/browser/resources/md_user_manager/user_manager.js
index 6864f2c15aee827e7fb3d549e0cf1d4bd0b9f64e..ed6e7fd2dfc6fc742ef9231df71ab37d78d9b8fb 100644
--- a/chrome/browser/resources/md_user_manager/user_manager.js
+++ b/chrome/browser/resources/md_user_manager/user_manager.js
@@ -40,6 +40,12 @@ cr.define('cr.ui', function() {
     newDesktopUserManager: true,
 
     /**
+     * True if all (non-supervised and non-child) profiles are locked.
+     * @type {boolean}
+     */
+    areAllProfilesLocked: false,
+
+    /**
      * @override
      * Overrides clientAreaSize in DisplayManager. When a new profile is created
      * the #outer-container page may not be visible yet, so user-pods cannot be
@@ -74,8 +80,13 @@ cr.define('cr.ui', function() {
    *     displayed.
    * @param {boolean} showAddPerson True if 'Add Person' button should be
    *     displayed.
+   * @param {boolean} areAllProfilesLocked True if all profiles are locked.
    */
-  UserManager.showUserManagerScreen = function(showGuest, showAddPerson) {
+  UserManager.showUserManagerScreen = function(showGuest,
+                                               showAddPerson,
+                                               areAllProfilesLocked) {
+    UserManager.getInstance().areAllProfilesLocked = areAllProfilesLocked;
+
     UserManager.getInstance().showScreen({id: 'account-picker',
                                           data: {disableAddUser: false}});
     // Hide control options if the user does not have the right permissions.
@@ -132,6 +143,14 @@ cr.define('cr.ui', function() {
     DisplayManager.clearErrors();
   };
 
+  /**
+   * Shows the error dialog populated with the given message.
+   * @param {string} message Error message to show.
+   */
+  UserManager.showErrorDialog = function(message) {
+    document.querySelector('error-dialog').show(message);
+  };
+
   // Export
   return {
     UserManager: UserManager