When testing on Windows, the window no longer turns black, but the rounded corners are still not restored

@mlaurencin try now, fixed in 54c1726

@mlaurencin try now, fixed in 54c1726

Great! Works for me now. Also I was able to build on x64 locally, so the build job for that might just need to rerun

Release Notes Persisted

Fixed an issue where windows on Windows with backgroundMaterial lost effect on maximization.

I was unable to backport this PR to "33-x-y" cleanly;
you will need to perform this backport manually.

I have automatically backported this PR to "35-x-y", please check out #45525

I have automatically backported this PR to "34-x-y", please check out #45526

This seems still a workaround to me because the animated resizing seems missing, and this is actually a "manual maximizing".

The resizing animation seems needs WS_THICKFRAME to be working, but this patch disable it when maximizing.

My previous observation make me wonder if Chromium's window is actually an child window of actual app window, while a typical WPF/WinUI app seems directly apply these styles on app window.

Anyway, it is a progress 👍🏻

@codebytere , I'm testing v34.2.0 with a browser window with the following configuration:

{
  titleBarStyle: 'hidden',
  titleBarOverlay: true,
  backgroundMaterial: 'auto'
}

If I maximize the window by pressing the maximize overlay button, it works fine (apart from the lack of animation which was already mentioned).

If I maximize the window by double-clicking the draggable region of the window (-webkit-app-region: drag;) or via right click -> Maximize the issue is still reproducible. And more problematically, now the maximize button doesn't do anything when pressed.

@eliandoran There's issue #46753 now. If you see additional incorrect behavior besides the issue that I linked, please file a new issue.

(In general, comments on merged PRs often gets lost. Issues generally don't.)