(For after the code freeze.)
I think we want to have this DLL living in Wine for easier development, and probably dynamically load our custom Chromium fork from here. (just like MSHTML and wine-Gecko)
The code for that fork could then be created in its own repo.
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v6: embeddedbrowserwebview: Create CreateWebViewEnvironmentWithOptionsInternal stub.
embeddedbrowserwebview: Add stub dll.
https://gitlab.winehq.org/wine/wine/-/merge_requests/7032