Update from chromium https://crrev.com/302282

cc/base/delayed_unique_notifier.cc

Index: cc/base/delayed_unique_notifier.cc
diff --git a/cc/base/delayed_unique_notifier.cc b/cc/base/delayed_unique_notifier.cc
index c2972677da6fafcb2a4e4b935c4c8b5a0d7b179c..1824226c2a6d19838d817c06a0824714784ff00e 100644
--- a/cc/base/delayed_unique_notifier.cc
+++ b/cc/base/delayed_unique_notifier.cc
@@ -43,6 +43,15 @@ void DelayedUniqueNotifier::Cancel() {
   next_notification_time_ = base::TimeTicks();
 }
 
+void DelayedUniqueNotifier::Shutdown() {
+  // This function must destroy any weak ptrs since after being cancelled, this
+  // class may be destroyed on another thread during compositor shutdown.
+  weak_ptr_factory_.InvalidateWeakPtrs();
+  // Deliberately leaves notification_pending_ = true forever so new tasks with
+  // weak ptrs can not be created.
+  notification_pending_ = true;
+}
+
 bool DelayedUniqueNotifier::HasPendingNotification() const {
   return notification_pending_ && !next_notification_time_.is_null();
 }