Add settings UI for managing defaults

chrome/browser/resources/options2/content_settings.js

Index: chrome/browser/resources/options2/content_settings.js
diff --git a/chrome/browser/resources/options2/content_settings.js b/chrome/browser/resources/options2/content_settings.js
index fd45acafb5f87034a75e14a9baa5e2c7bf9c24e5..204e8b4e0b857a056823068a7264ab4ce064e84b 100644
--- a/chrome/browser/resources/options2/content_settings.js
+++ b/chrome/browser/resources/options2/content_settings.js
@@ -80,6 +80,13 @@ cr.define('options', function() {
       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);