so Dialogs can join the modal chain of the window parenting them.
Fixes apps that use FileSystemAccess to sandbox FilePicker not
respecting its blocking effect.
Each of these strings would previously rely on StringView's char const*
constructor overload, which would call __builtin_strlen on the string.
Since we now have operator ""sv, we can replace these with much simpler
versions. This opens the door to being able to remove
StringView(char const*).
No functional changes.
These functions were changed to synchronous in #13870 but
the async_ versions were still being called. This led to
frequent crashes when loading local files in Browser.
Before this patch, when you called FileSystemAccessServer::Client::try_*
twice, the second call used the same variable to store the promise. This
"race condition" is now solved using a HashMap, to store multiple
parallel requests.
