Add settings UI for managing defaults

chrome/browser/resources/options2/content_settings.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() {
   /** @const */ var OptionsPage = options.OptionsPage;
 
   //////////////////////////////////////////////////////////////////////////////
   // ContentSettings class:
 
@@ skipping 62 matching lines @@
         OptionsPage.navigateToPage('cookies');
       };
       $('show-app-cookies-button').onclick = function(event) {
         OptionsPage.navigateToPage('app-cookies');
       };
 
       var intentsSection = $('intents-section');
       if (!loadTimeData.getBoolean('enable_web_intents') && intentsSection)
         intentsSection.parentNode.removeChild(intentsSection);
 
+      var webIntentsOptionsButton = $('manage-web-intents-defaults-button');
+      if (webIntentsOptionsButton) {
+        webIntentsOptionsButton.onclick = function(event) {
+          OptionsPage.navigateToPage('web-intents-defaults');
+        };
+      }
+
       $('content-settings-overlay-confirm').onclick =
           OptionsPage.closeOverlay.bind(OptionsPage);
 
       $('pepper-flash-cameramic-section').style.display = 'none';
       $('pepper-flash-cameramic-exceptions-div').style.display = 'none';
     },
   };
 
   ContentSettings.updateHandlersEnabledRadios = function(enabled) {
     var selector = '#content-settings-page input[type=radio][value=' +
@@ skipping 77 matching lines @@
     $('pepper-flash-cameramic-section').style.display = '';
     $('pepper-flash-cameramic-exceptions-div').style.display = '';
   }
 
   // Export
   return {
     ContentSettings: ContentSettings
   };
 
 });