Add Active Directory password change screen.

ui/login/display_manager.js

Index: ui/login/display_manager.js
diff --git a/ui/login/display_manager.js b/ui/login/display_manager.js
index 5ca41e2fd8983efed10bd1eb9193db919fd2bbd8..1ec9dec3f48f8cccb7277c68b95f63323340b72b 100644
--- a/ui/login/display_manager.js
+++ b/ui/login/display_manager.js
@@ -34,6 +34,8 @@
 /** @const */ var SCREEN_DEVICE_DISABLED = 'device-disabled';
 /** @const */ var SCREEN_UNRECOVERABLE_CRYPTOHOME_ERROR =
     'unrecoverable-cryptohome-error';
+/** @const */ var SCREEN_ACTIVE_DIRECTORY_PASSWORD_CHANGE =
+    'ad-password-change';
 
 /* Accelerator identifiers. Must be kept in sync with webui_login_view.cc. */
 /** @const */ var ACCELERATOR_CANCEL = 'cancel';
@@ -1003,6 +1005,15 @@ cr.define('cr.ui.login', function() {
   };
 
   /**
+   * Shows password change screen for Active Directory users.
+   * @param {string} username Display name of the user whose password is being
+   * changed.
+   */
+  DisplayManager.showActiveDirectoryPasswordChangeScreen = function(username) {
+    login.ActiveDirectoryPasswordChangeScreen.show(username);
+  };
+
+  /**
    * Clears error bubble.
    */
   DisplayManager.clearErrors = function() {