UWP app exits after immersive mode starts in emulator

[jdm]

This looks like it might be a regression from #25799, or possibly a new base emulator image triggered it. The order of operations is that immersive mode starts, then the app is suspended. We happily queue a shutdown task which tells the compositor to exit, which tells the constellation to exit, which tells the script thread to exit, which tells webxr to exit, and then the app is totally shut down before any immersive content appears.

[jdm]

This continues to happen when I comment out the Page->Shutdown() in OnSuspend, and then none of my other breakpoints related to shutting down the compositor and constellation get hit.

[jdm]

This affects me in the HoloLens emulator, but not in a VR headset with servo/webxr#132 applied.

[paulrouget]

I can't reproduce.

Which version of the emulator?

[jdm]

10.0.18362.1053

I see it in both debug and release builds.

[paulrouget]

And does reverting #25799 help?

[jdm]

This was fixed by removing the code that shut down the browser in the suspend event handler.