[PATCH 0/1] MR6821: d3d9/tests: Flush events after minimizing and restoring focus window.

[Rémi Bernon (＠rbernon)]

Minimizing the window might trigger a focus change to the dummy window,
while restoring and setting foreground should change the foreground
back to the focus window.

However, the X window manager will instead send WM_TAKE_FOCUS event to
the dummy window and to the focus window concurrently, and the dummy
window might reply to it *after* we've restored the foreground to the
focus window. This will later cause the device window to fail to get
foreground, and the tests to randomly fail.

(This works around a foreground window race condition that will be difficult
to fix otherwise, as it can happen in a cross-process context as well)