[Media Router WebUI] Resolve AX_ARIA_08 failure.

chrome/test/data/webui/media_router/media_router_elements_browsertest.js

Index: chrome/test/data/webui/media_router/media_router_elements_browsertest.js
diff --git a/chrome/test/data/webui/media_router/media_router_elements_browsertest.js b/chrome/test/data/webui/media_router/media_router_elements_browsertest.js
index 3b9a65d5341d543ea4ff049e8600873850ea6c50..82ad2bc2a7ee0b5d86d5d19191e5cd329e00ac15 100644
--- a/chrome/test/data/webui/media_router/media_router_elements_browsertest.js
+++ b/chrome/test/data/webui/media_router/media_router_elements_browsertest.js
@@ -64,16 +64,6 @@ MediaRouterElementsBrowserTest.prototype = {
     this.accessibilityAuditConfig.ignoreSelectors(
         'badAriaAttributeValue', '#input');
 
-    var requiredOwnedAriaRoleMissingSelectors = [
-      '#cast-mode-list',
-      '#sink-list'
-    ];
-
-    // Enable when failure is resolved.
-    // AX_ARIA_08: http://crbug.com/591552
-    this.accessibilityAuditConfig.ignoreSelectors(
-        'requiredOwnedAriaRoleMissing', requiredOwnedAriaRoleMissingSelectors);
-
     // This element is used as a focus placeholder on dialog open, then
     // deleted. The user will be unable to tab to it. Remove when there is a
     // long term fix.