This is Chrome's locally patched copy of Colin Percival's bsdiff tool
(see ../bspatch for the corresponding bspatch tool).

Originally obtained from Mozilla's local copy/fork of bsdiff; see:

http://lxr.mozilla.org/mozilla/source/other-licenses/bsdiff/bsdiff.c

The LICENSE from that location has been preserved here.

Local changes include CRC32 verification.