ShouldDisplayOverFullscreen implementation

ui/message_center/notification_delegate.cc

Index: ui/message_center/notification_delegate.cc
diff --git a/ui/message_center/notification_delegate.cc b/ui/message_center/notification_delegate.cc
index dd0d54b52d3c6744c3736fe546ef3cb79fb19c91..405c70384fd5ed22ba8702e21b1fe880606df350 100644
--- a/ui/message_center/notification_delegate.cc
+++ b/ui/message_center/notification_delegate.cc
@@ -57,4 +57,8 @@ void HandleNotificationButtonClickDelegate::ButtonClick(int button_index) {
     button_callback_.Run(button_index);
 }
 
+bool NotificationDelegate::ShouldDisplayOverFullscreen() const {
+  return false;
+}
+
 }  // namespace message_center