refactor-864370: Make conversions less smart
refactor-864370: Make conversions less smart

Just like the dangers of content-type sniffing, so we shouldn't be
guessing at the type of data as we convert it.

Signed-off-by: Joe Walker <7a17872fbb32c7d760c9a16ee3076daead11efcf@mozilla.com>

mozilla/gcli,mozilla/gcli,joewalker/gcli,mozilla/gcli,joewalker/gcli