MD Settings: Close action menu when opening edit cookie exception dialog.

chrome/test/data/webui/settings/site_list_tests.js

Index: chrome/test/data/webui/settings/site_list_tests.js
diff --git a/chrome/test/data/webui/settings/site_list_tests.js b/chrome/test/data/webui/settings/site_list_tests.js
index 594fb8a503f8b6ff005f5ab0e1c67e23f8890eef..852a35a93411995d58dc34844088e459eeca09a1 100644
--- a/chrome/test/data/webui/settings/site_list_tests.js
+++ b/chrome/test/data/webui/settings/site_list_tests.js
@@ -633,10 +633,13 @@ cr.define('site_list', function() {
 
           openActionMenu(0);
           assertMenu(['Allow', 'Block', 'Edit', 'Remove'], testElement);
+          var menu = testElement.$$('dialog[is=cr-action-menu]');
+          assertTrue(menu.open);
           var edit = testElement.$.edit;
           assertTrue(!!edit);
           MockInteractions.tap(edit);
           Polymer.dom.flush();
+          assertFalse(menu.open);
 
           assertTrue(!!testElement.$$('settings-edit-exception-dialog'));
         });