Fix some grammar in chrome/browser/resources/

chrome/browser/resources/options/advanced_options.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.
 
 cr.define('options', function() {
 
 var OptionsPage = options.OptionsPage;
 
   //
   // AdvancedOptions class
@@ skipping 104 matching lines @@
           chrome.send('backgroundModeAction',
               [String($('backgroundModeCheckbox').checked)]);
         };
       }
 
       // 'cloudPrintProxyEnabled' is true for Chrome branded builds on
       // certain platforms, or could be enabled by a lab.
       if (!cr.isChromeOS) {
         $('cloudPrintConnectorSetupButton').onclick = function(event) {
           if ($('cloudPrintManageButton').style.display == 'none') {
-            // Disable the button, set it's text to the intermediate state.
+            // Disable the button, set its text to the intermediate state.
             $('cloudPrintConnectorSetupButton').textContent =
               localStrings.getString('cloudPrintConnectorEnablingButton');
             $('cloudPrintConnectorSetupButton').disabled = true;
             chrome.send('showCloudPrintSetupDialog');
           } else {
             chrome.send('disableCloudPrintConnector');
           }
         };
       }
       $('cloudPrintManageButton').onclick = function(event) {
@@ skipping 131 matching lines @@
         connectorSectionElm.parentNode.removeChild(connectorSectionElm);
     }
   };
 
   // Export
   return {
     AdvancedOptions: AdvancedOptions
   };
 
 });