In Qt 4.8 this generated a warning. For Qt 5 we should no longer
accept file urls without a scheme set. So you should use file://
for local files.
Change-Id: I57789e2b56b712aa4f370aec9437c6febf0d0211
Reviewed-on: http://codereview.qt.nokia.com/1822
Reviewed-by: Markus Goetz