Add the "options_ui" extension manifest field.

chrome/browser/resources/extensions/extension_list.js

Index: chrome/browser/resources/extensions/extension_list.js
diff --git a/chrome/browser/resources/extensions/extension_list.js b/chrome/browser/resources/extensions/extension_list.js
index f7e0b083cdb589534785a25c90fa35d19807a5db..acdfd7e1792b059bc153fa1920a39b954c4abdb2 100644
--- a/chrome/browser/resources/extensions/extension_list.js
+++ b/chrome/browser/resources/extensions/extension_list.js
@@ -272,7 +272,8 @@ cr.define('options', function() {
       if (extension.enabled && extension.optionsUrl) {
         var options = node.querySelector('.options-link');
         options.addEventListener('click', function(e) {
-          if (this.data_.enableEmbeddedExtensionOptions) {
+          if (this.data_.enableEmbeddedExtensionOptions &&

[not at google - send to devlin, 2014/08/29 05:39:23]

The flag check should be unnecessary now, so long as OpenInTab returns true when
the flag is off. Which it should.

[ericzeng, 2014/08/29 16:52:22]

Hold your horses, I haven't removed the feature flag quite yet.

[ericzeng, 2014/08/29 22:08:49]

Done.

+              !extension.options_open_in_tab) {
             this.showEmbeddedExtensionOptions_(extension.id, false);
           } else {
             chrome.send('extensionSettingsOptions', [extension.id]);