Cleanup: fix some CSS comment styles (especially copyrights)

ui/webui/resources/css/widgets.css

 /* 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. */
 
 /* This file defines styles for form controls. The order of rule blocks is
  * important as there are some rules with equal specificity that rely on order
  * as a tiebreaker. These are marked with OVERRIDE. */
 
 @import url(action_link.css);
 
@@ skipping 234 matching lines @@
 /* Checkbox/radio helpers ******************************************************
  *
  * .checkbox and .radio classes wrap labels. Checkboxes and radios should use
  * these classes with the markup structure:
  *
  *   <div class="checkbox">
  *     <label>
  *       <input type="checkbox"></input>
  *       <span>
  *     </label>
- *   </div>
- */
+ *   </div> */

[michaelpg, 2016/08/11 08:08:13]

putting code next to code really doesn't seem good to me.

[Dan Beam, 2016/08/12 00:31:29]

fine, reverted

 
 :-webkit-any(.checkbox, .radio) label {
   -webkit-user-select: none;
   /* Don't expand horizontally: <http://crbug.com/112091>. */
   align-items: center;
   display: inline-flex;
   padding-bottom: 7px;
   padding-top: 7px;
 }
 
@@ skipping 13 matching lines @@
 
 label > input:disabled:-webkit-any([type='checkbox'], [type='radio']) ~ span {
   color: #999;
 }
 
 extensionview {
   display: inline-block;
   height: 300px;
   width: 300px;
 }