Fuchsia changed the kernel name from Magenta to Zircon, along with the associated function names mx_ -> zx_, MX_ to ZX_, etc.
https://fuchsia.googlesource.com/scripts/+/master/zirconize.sh
src.git is mostly trivial, but third_party might take some 3-sided rolls. (v8 and boringssl in particular)
Comment 1 by bugdroid1@chromium.org
, Sep 15 2017