Close the notification after user clicks cancel button in message center (2nd try)
When the message center opens, NotificationUIManager::CancelById method doesn't close the notification. We need to call MessageCenter::RemoveNotification in addition.
The use-after-free on the previous patch has been fixed in this patch.
BUG=481078
TEST=manually tested, added test succees
CQ_EXTRA_TRYBOTS=tryserver.chromium.linux:linux_chromium_chromeos_msan_rel_ng
Review URL: https://codereview.chromium.org/
1135503002
Cr-Commit-Position: refs/heads/master@{#328886}