[Clean up] Fix style guide nits in chrome/browser/resources/options2.

chrome/browser/resources/options2/clear_browser_data_overlay.css

-/*
-Copyright (c) 2011 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.
-*/
+/* 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. */
 
 #clearBrowserDataOverlay {
   min-width: 500px;
 }
 
 #clearBrowserDataOverlay > .content-area label {
   margin: 5px 0;
 }
 
 #clear-data-checkboxes {
   -webkit-padding-start: 8px;
   margin: 5px 0;
 }
 
 #cbdThrobber {
   margin: 4px 10px;
   vertical-align: middle;
   visibility: hidden;
 }