Unfortunately, using nsStdURL parses the data URI so that a URI like "data:text/html,<html>hi</html>" gets parsed with a host of "text". When the rest of the data URI processing calls GetSpec, it then gets "//text/html,<html>hi</html>", which confuses the content type parsing so no data is displayed. This checkin changes to use a nsSimpleURI instead. r=valeski git-svn-id: svn://10.0.0.236/trunk@55647 18797224-902f-48f8-a5cc-f745e15eee43