Fix the regression caused by r72061.

chrome/browser/resources/options/advanced_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;
 
   //
   // AdvancedOptions class
@@ skipping 31 matching lines @@
 
       // 'metricsReportingEnabled' element is only present on Chrome branded
       // builds.
       if ($('metricsReportingEnabled')) {
         $('metricsReportingEnabled').onclick = function(event) {
           chrome.send('metricsReportingCheckboxAction',
               [String(event.target.checked)]);
         };
       }
 
-      $('autoOpenFileTypesResetToDefault').onclick = function(event) {
-        chrome.send('autoOpenFileTypesAction');
-      };
+      if (!cr.isChromeOS) {
+        $('autoOpenFileTypesResetToDefault').onclick = function(event) {
+          chrome.send('autoOpenFileTypesAction');
+        };
+      }
+
       $('fontSettingsCustomizeFontsButton').onclick = function(event) {
         OptionsPage.showPageByName('fontSettings');
         chrome.send('coreOptionsUserMetricsAction', ['Options_FontSettings']);
       };
       $('defaultFontSize').onchange = function(event) {
         chrome.send('defaultFontSizeAction',
             [String(event.target.options[event.target.selectedIndex].value)]);
       };
       $('language-button').onclick = function(event) {
         OptionsPage.showPageByName('language');
@@ skipping 129 matching lines @@
   };
 
   // Set the download path.
   AdvancedOptions.SetDownloadLocationPath = function(path) {
     if (!cr.isChromeOS)
       $('downloadLocationPath').value = path;
   };
 
   // Set the enabled state for the autoOpenFileTypesResetToDefault button.
   AdvancedOptions.SetAutoOpenFileTypesDisabledAttribute = function(disabled) {
-    $('autoOpenFileTypesResetToDefault').disabled = disabled;
+    if (!cr.isChromeOS)
+      $('autoOpenFileTypesResetToDefault').disabled = disabled;
   };
 
   // Set the enabled state for the proxy settings button.
   AdvancedOptions.SetupProxySettingsSection = function(disabled, label) {
     $('proxiesConfigureButton').disabled = disabled;
     $('proxiesLabel').textContent = label;
   };
 
   // Set the checked state for the sslCheckRevocation checkbox.
   AdvancedOptions.SetCheckRevocationCheckboxState = function(
@@ skipping 54 matching lines @@
     if (proxySectionElm)
       proxySectionElm.parentNode.removeChild(proxySectionElm);
   };
 
   // Export
   return {
     AdvancedOptions: AdvancedOptions
   };
 
 });