Change the title of the desktop User Manager widget.

chrome/browser/resources/user_manager/user_manager_tutorial.css

 /* Copyright 2014 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.
  */
 
 .tutorial-slide {
   -webkit-transition: opacity 200ms ease-in-out;
   background-color: white;
   border-radius: 2px;
   bottom: 0;
@@ skipping 159 matching lines @@
   background-color: rgb(179, 229, 252);
   background-image: url(
       'chrome://theme/IDR_ICON_USER_MANAGER_TUTORIAL_FRIENDS');
 }
 
 #slide-complete .slide-image {
   background-color: white;
   background-image: url(
       'chrome://theme/IDR_ICON_USER_MANAGER_TUTORIAL_COMPLETE');
 }
+
+#slide-not-you #dismiss-bubble-button {
+  background-image: url('chrome://theme/IDR_CLOSE_1');
+  cursor: pointer;
+  height: 16px;
+  position: absolute;
+  right: 5px;
+  top: 5px;
+  width: 16px;
+}
+
+html[dir=rtl] #slide-not-you #dismiss-bubble-button {
+  left: 5px;
+}