Fix crash when removing all notifications by "Clear all" button.

ui/message_center/message_center_impl.cc

Index: ui/message_center/message_center_impl.cc
diff --git a/ui/message_center/message_center_impl.cc b/ui/message_center/message_center_impl.cc
index 0db1a54ba98ca72634d8658c5f1c3bb5e281f31d..4e90822a60c39912172e7c3b82310b7d8c69c271 100644
--- a/ui/message_center/message_center_impl.cc
+++ b/ui/message_center/message_center_impl.cc
@@ -656,8 +656,8 @@ void MessageCenterImpl::RemoveAllNotifications(bool by_user, RemoveType type) {
   bool remove_pinned = (type == RemoveType::ALL);
 
   const NotificationBlockers& blockers =
-      (type == RemoveType::ALL ? NotificationBlockers() /* empty blockers */
-                               : blockers_ /* use default blockers */);
+      remove_pinned ? NotificationBlockers() /* empty blockers */
+                    : blockers_;             /* use default blockers */
 
   const NotificationList::Notifications notifications =
       notification_list_->GetVisibleNotifications(blockers);