Convert Pass()→std::move() in //ui (CrOS edition)

ui/message_center/message_center_tray_unittest.cc

Index: ui/message_center/message_center_tray_unittest.cc
diff --git a/ui/message_center/message_center_tray_unittest.cc b/ui/message_center/message_center_tray_unittest.cc
index ec5130d9da1615dbd2aef1a482e5b246a93c4bd3..5d443108cc7c1fa51921f6638037016350b4c400 100644
--- a/ui/message_center/message_center_tray_unittest.cc
+++ b/ui/message_center/message_center_tray_unittest.cc
@@ -300,7 +300,7 @@ TEST_F(MessageCenterTrayTest, ContextMenuTestWithMessageCenter) {
       ASCIIToUTF16("Notification message body."), gfx::Image(),
       base::string16() /* empty display source */, GURL(), notifier_id2,
       message_center::RichNotificationData(), NULL /* delegate */));
-  message_center_->AddNotification(notification.Pass());
+  message_center_->AddNotification(std::move(notification));
 
   AddNotification(id3);