Refactor Instant web UI (chrome://settings page).

chrome/browser/resources/options/instant_confirm_overlay.js

Index: chrome/browser/resources/options/instant_confirm_overlay.js
diff --git a/chrome/browser/resources/options/instant_confirm_overlay.js b/chrome/browser/resources/options/instant_confirm_overlay.js
index 9f983c7518a974e49d841c6568ae91c6c2d429a6..01a9ee5025bd6fffa3fed9cda29f389df748f536 100644
--- a/chrome/browser/resources/options/instant_confirm_overlay.js
+++ b/chrome/browser/resources/options/instant_confirm_overlay.js
@@ -22,13 +22,12 @@ cr.define('options', function() {
 
       $('instantConfirmCancel').onclick = function() {
         OptionsPage.closeOverlay();
+        $('instantEnabledCheckbox').checked = false;
       };
+
       $('instantConfirmOk').onclick = function() {
         OptionsPage.closeOverlay();
-        Preferences.setBooleanPref('instant.confirm_dialog_shown', true);
-        var instantEnabledCheckbox = $('instantEnableCheckbox');
-        Preferences.setBooleanPref(instantEnableCheckbox.pref, true,
-                                   instantEnableCheckbox.metric);
+        chrome.send('enableInstant');
       };
     },
   };