Re-enable ManyPopupNotifications test for linux aura.

chrome/browser/ui/views/message_center/web_notification_tray_browsertest.cc

Index: chrome/browser/ui/views/message_center/web_notification_tray_browsertest.cc
diff --git a/chrome/browser/ui/views/message_center/web_notification_tray_browsertest.cc b/chrome/browser/ui/views/message_center/web_notification_tray_browsertest.cc
index c4ea34dbb9959914683401d705f3a2495085e05a..9712d7c566f2902801067703ad513d3b10d8dbb6 100644
--- a/chrome/browser/ui/views/message_center/web_notification_tray_browsertest.cc
+++ b/chrome/browser/ui/views/message_center/web_notification_tray_browsertest.cc
@@ -189,14 +189,7 @@ IN_PROC_BROWSER_TEST_F(WebNotificationTrayTest,
             tray->message_center_delegate_->NumMessageViewsForTest());
 }
 
-#if defined(OS_LINUX) && !defined(OS_CHROMEOS) && defined(USE_AURA)
-// TODO(erg): linux_aura bringup: http://crbug.com/163931
-#define MAYBE_ManyPopupNotifications DISABLED_ManyPopupNotifications
-#else
-#define MAYBE_ManyPopupNotifications ManyPopupNotifications
-#endif
-
-IN_PROC_BROWSER_TEST_F(WebNotificationTrayTest, MAYBE_ManyPopupNotifications) {
+IN_PROC_BROWSER_TEST_F(WebNotificationTrayTest, ManyPopupNotifications) {
   scoped_ptr<WebNotificationTray> tray(new WebNotificationTray());
   message_center::MessageCenter* message_center = tray->message_center();