Whether the file chooser should allow selecting multiple files.
Determine whether the file chooser associated to this
#WebKitFileChooserRequest should allow selecting multiple files,
which depends on the HTML input element having a 'multiple'
attribute defined.
Whether the file chooser should allow selecting multiple files.
Determine whether the file chooser associated to this #WebKitFileChooserRequest should allow selecting multiple files, which depends on the HTML input element having a 'multiple' attribute defined.