Handler settings page.

chrome/browser/resources/options/content_settings_ui.js

 // Copyright (c) 2010 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() {
 
   //////////////////////////////////////////////////////////////////////////////
   // ContentSettingsRadio class:
 
   // Define a constructor that uses an input element as its underlying element.
   var ContentSettingsRadio = cr.ui.define('input');
 
   ContentSettingsRadio.prototype = {
     __proto__: HTMLInputElement.prototype,
 
     /**
      * Initialization function for the cr.ui framework.
      */
     decorate: function() {
       this.type = 'radio';
       var self = this;
 
       this.addEventListener('change',
           function(e) {
             chrome.send('setContentFilter', [this.name, this.value]);
           });
     },
   };
 
+  //////////////////////////////////////////////////////////////////////////////
+  // HandlersEnabledRadio class:
+
+  // Define a constructor that uses an input element as its underlying element.
+  var HandlersEnabledRadio = cr.ui.define('input');
+
+  HandlersEnabledRadio.prototype = {
+    __proto__: HTMLInputElement.prototype,
+
+    /**
+     * Initialization function for the cr.ui framework.
+     */
+    decorate: function() {
+      this.type = 'radio';
+      var self = this;
+
+      this.addEventListener('change',
+          function(e) {
+            chrome.send('setHandlersEnabled', [this.value == 'allow']);

[tony, 2011/05/23 21:42:00]

Why doesn't this use the ContentSettingsRadio/setContentFilter like all the
other sections on this page?

[koz (OOO until 15th September), 2011/05/24 08:47:49]

We're managing a different kind of data here - the other sections all share a
blacklist/wildcard kind of data, here we are dealing with a map from protocols
to lists of protocol handlers.

+          });
+    },
+  };
+
   // Export
   return {
-    ContentSettingsRadio: ContentSettingsRadio
+    ContentSettingsRadio: ContentSettingsRadio,
+    HandlersEnabledRadio: HandlersEnabledRadio
   };
 
 });