Get rid of some <label for> misuse in browser_options.html

chrome/browser/resources/options/controlled_setting.css

 /* Copyright 2013 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. */
 
 /* Controlled setting indicator and bubble. */
 
 .controlled-setting-with-label {
   -webkit-box-align: center;
   display: -webkit-box;
   padding-bottom: 7px;
   padding-top: 7px;
 }
 
 .controlled-setting-with-label input + span {
   -webkit-box-align: center;
   -webkit-box-flex: 1;
   -webkit-margin-start: 0.6em;
-  -webkit-user-select: none;
   display: -webkit-box;
 }
 
 .controlled-setting-with-label input:disabled + span label {
   color: #999;
 }
 
 .controlled-setting-with-label label {
   display: inline;
   padding: 0;
@@ skipping 66 matching lines @@
 .controlled-setting-bubble-extension-disable-button {
   bottom: 0;
   position: absolute;
   right: 0;
 }
 
 html[dir='rtl'] .controlled-setting-bubble-extension-disable-button {
   left: 0;
   right: auto;
 }