Show an extra privacy warning on Win8

chrome/browser/resources/options2/browser_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;
   var ArrayDataModel = cr.ui.ArrayDataModel;
   var RepeatingButton = cr.ui.RepeatingButton;
 
   //
@@ skipping 227 matching lines @@
       // Default browser section.
       if (!cr.isChromeOS) {
         $('set-as-default-browser').onclick = function(event) {
           chrome.send('becomeDefaultBrowser');
         };
 
         $('auto-launch').onclick = this.handleAutoLaunchChanged_;
       }
 
       // Privacy section.
+      var winVerMatch = /Windows NT (\d+(?:\.\d+))?/.exec(navigator.userAgent);

[Lei Zhang, 2012/08/17 02:28:13]

If this is generally useful, please consider moving into into a common .js file
to share with other WebUIs.

[MAD, 2012/08/17 17:34:09]

I doubt (and actually hope) it won't be used much...
And since we want to merge this to M22, I would prefer to keep the CL as small
as possible...

But if I get to need this again, I promise I won't copy the code, I'll extract
it... :-)

+      var isWin8 = winVerMatch && winVerMatch[1] >= 6.2;
+      var win8Element = $('privacy-win8-data-settings');
+      if (win8Element)
+        win8Element.hidden = !isWin8;
       $('privacyContentSettingsButton').onclick = function(event) {
         OptionsPage.navigateToPage('content');
         OptionsPage.showTab($('cookies-nav-tab'));
         chrome.send('coreOptionsUserMetricsAction',
             ['Options_ContentSettings']);
       };
       $('privacyClearDataButton').onclick = function(event) {
         OptionsPage.navigateToPage('clearBrowserData');
         chrome.send('coreOptionsUserMetricsAction', ['Options_ClearData']);
       };
@@ skipping 1083 matching lines @@
     BrowserOptions.getLoggedInUsername = function() {
       return BrowserOptions.getInstance().username_;
     };
   }
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 });