Update optinos UI to display "/special/drive/root" as "Google Drive".

chrome/browser/resources/options/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 844 matching lines @@
      * @param {Event} event Change event.
      * @private
      */
     onDefaultDownloadDirectoryChanged_: function(event) {
       $('downloadLocationPath').value = event.value.value;
       if (cr.isChromeOS) {
         // On ChromeOS, replace /special/drive with Drive for drive paths, and
         // /home/chronos/user/Downloads with Downloads for local files.
         // Also replace '/' with ' \u203a ' (angled quote sign) everywhere.
         var path = $('downloadLocationPath').value;
-        path = path.replace(/^\/special\/drive/, 'Google Drive');
+        path = path.replace(/^\/special\/drive\/root/, 'Google Drive');
         path = path.replace(/^\/home\/chronos\/user\//, '');
         path = path.replace(/\//g, ' \u203a ');
         $('downloadLocationPath').value = path;
       }
       if (event.value.disabled)
         $('download-location-label').classList.add('disabled');
       else
         $('download-location-label').classList.remove('disabled');
       $('downloadLocationChangeButton').disabled = event.value.disabled;
     },
@@ skipping 564 matching lines @@
     BrowserOptions.getLoggedInUsername = function() {
       return BrowserOptions.getInstance().username_;
     };
   }
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 });