load the sheet if the type is text/css (strict mode change only). bug 46225, r=dbaron, sr=attinasi git-svn-id: svn://10.0.0.236/trunk@108487 18797224-902f-48f8-a5cc-f745e15eee43
load the sheet if the type is text/css (strict mode change only). bug 46225, r=dbaron, sr=attinasi git-svn-id: svn://10.0.0.236/trunk@108487 18797224-902f-48f8-a5cc-f745e15eee43