Necessary routines were extracted from other files in:
6c3bf03265/
(otherwise a lot of code would have had to be imported, most of which would be
unused anyway.)
These extracted routines were reduced to only the actually-used code.
base::StringPrintf was only used to stringify a few hex values, this particular
use was easier to reimplement in a small loop rather than trying to extract the
whole printf suite.
base::UTF8toUTF16 is not needed, as we just return bytes. So internally a
std::string (containing UTF8) is used and its contents transferred to the
output buffer.
Gerald Squelart