f10b3eac62
The frame size_allocate() will set it correctly once show() is called by the window tracker. This is less code and also help reduces the chance of a brief visual glitch in fullscreen games during startup. If the window is initially still decorated the gray area would still show up until the next redraw, which due to loading times can take a while. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3608>