Add warning to Mac that passwords are shared between profiles through the underlying keychain.

chrome/browser/resources/options/personal_options.js

 // Copyright (c) 2011 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;
 
   // State variables.
@@ skipping 123 matching lines @@
 
       if (PersonalOptions.disablePasswordManagement()) {
         // Disable the Password Manager in guest mode.
         $('passwords-offersave').disabled = true;
         $('passwords-neversave').disabled = true;
         $('passwords-offersave').value = false;
         $('passwords-neversave').value = true;
         $('manage-passwords').disabled = true;
       }
 
+      $('mac-passwords-warning').hidden =
+          !(localStrings.getString('macPasswordsWarning'));
+
       if (PersonalOptions.disableAutofillManagement()) {
         $('autofill-settings').disabled = true;
 
         // Disable and turn off autofill.
         var autofillEnabled = $('autofill-enabled');
         autofillEnabled.disabled = true;
         autofillEnabled.checked = false;
         cr.dispatchSimpleEvent(autofillEnabled, 'change');
       }
     },
@@ skipping 186 matching lines @@
       PersonalOptions.getInstance()[name + '_'](value);
     };
   });
 
   // Export
   return {
     PersonalOptions: PersonalOptions
   };
 
 });