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

chrome/browser/ui/webui/options/options_browsertest.js

 // 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.
 
 GEN('#include "chrome/browser/ui/webui/options/options_browsertest.h"');
 
 /** @const */ var SUPERVISED_USERS_PREF = 'profile.managed_users';
 
 /**
  * Wait for the method specified by |methodName|, on the |object| object, to be
@@ skipping 81 matching lines @@
 // Crashes on Mac only. See http://crbug.com/79181
 GEN('#if defined(OS_MACOSX)');
 GEN('#define MAYBE_testSetBooleanPrefTriggers ' +
     'DISABLED_testSetBooleanPrefTriggers');
 GEN('#else');
 GEN('#define MAYBE_testSetBooleanPrefTriggers testSetBooleanPrefTriggers');
 GEN('#endif  // defined(OS_MACOSX)');
 
 TEST_F('OptionsWebUITest', 'MAYBE_testSetBooleanPrefTriggers', function() {
   // TODO(dtseng): make generic to click all buttons.
-  var showHomeButton = $('show-home-button');
+  var showHomeButton =
+      document.querySelector('input[pref="browser.show_home_button"]');
   var trueListValue = [
     'browser.show_home_button',
     true,
     'Options_Homepage_HomeButton',
   ];
   // Note: this expectation is checked in testing::Test::tearDown.
   this.mockHandler.expects(once()).setBooleanPref(trueListValue);
 
   // Cause the handler to be called.
   showHomeButton.click();
@@ skipping 720 matching lines @@
   __proto__: OptionsWebUIExtendedTest.prototype,
 
   /** @override */
   browsePreload: 'chrome://settings-frame/nonexistantPage',
 };
 
 TEST_F('OptionsWebUIRedirectTest', 'TestURL', function() {
   assertEquals('chrome://settings-frame/', document.location.href);
   this.verifyHistory_([''], testDone);
 });