function: Add BeginRequest/EndRequest for JS_ValueRoot
function: Add BeginRequest/EndRequest for JS_ValueRoot

https://bugzilla.gnome.org/show_bug.cgi?id=691038

mtwebster/cjs,pixunil/cjs,endlessm/gjs,djdeath/gjs,pixunil/cjs,endlessm/gjs,mtwebster/cjs,djdeath/gjs,pixunil/cjs,endlessm/gjs,djdeath/gjs,pixunil/cjs,mtwebster/cjs,endlessm/gjs,djdeath/gjs,endlessm/gjs,djdeath/gjs,mtwebster/cjs,pixunil/cjs,mtwebster/cjs