Following https://bitbucket.org/chromiumembedded/ ... QuickStart, I found it necessary to run
set DEPOT_TOOLS_WIN_TOOLCHAIN=0
and (only) then
gclient runhooks
inside of chromium\src in order to get create.bat to run.
Maybe someone else has a different experience but I would think that this should be added to the Wiki page (it says I need "permission"). I will note that I attempted a few unsuccessful automatic builds first, so I can't 100% say that this is always needed, but it _was_ in my case...