[uber page] Convert 'Under the Hood' page to a sub-page.

chrome/browser/resources/options2/browser_options.js

Index: chrome/browser/resources/options2/browser_options.js
===================================================================
--- chrome/browser/resources/options2/browser_options.js	(revision 116378)
+++ chrome/browser/resources/options2/browser_options.js	(working copy)
@@ -53,6 +53,11 @@
         chrome.send('coreOptionsUserMetricsAction',
             ['Options_ManageSearchEngines']);
       };
+      $('advancedOptionsButton').onclick = function(event) {
+        OptionsPage.navigateToPage('advanced');
+        chrome.send('coreOptionsUserMetricsAction',
+            ['Options_OpenUnderTheHood']);
+      };
       $('defaultSearchEngine').onchange = this.setDefaultSearchEngine_;
 
       var self = this;