fix security issue by constructing the HAR file URL using wptHarFileUrl (rather than straight from querystring param)
fix security issue by constructing the HAR file URL using wptHarFileUrl (rather than straight from querystring param)

git-svn-id: d5a8a4092b1c3eddbe100e0c5fc6446cfb12afd1@911 fc7d47d3-c008-acd5-f51f-d19787b8a02f

paulcalvano/httparchive,HTTPArchive/httparchive,HTTPArchive/httparchive,paulcalvano/httparchive