Most of FileSystemGlib.cpp is redundant with FileSystemPOSIX.cpp. There is no good reason to implement the POSIX-style WTF::Filesystem APIs using GIO when we have access to POSIX. FileSystemGlib.cpp is now going to rather extreme lengths to work around impedance between the GIO and POSIX APIs, and it's much simpler to just use POSIX.
Pull request: https://github.com/WebKit/WebKit/pull/13153
Committed 263503@main (448487f4e635): <https://commits.webkit.org/263503@main> Reviewed commits have been landed. Closing PR #13153 and removing active labels.