How do I fix a crashpad compilation error (for windows)

Question

tI am following the instructions listed here: https://github.com/chromium/crashpad/blob/master/doc/developing.md

I cloned crashpad from here: https://chromium.googlesource.com/crashpad/crashpad

But I get the following results:

D:/Work/GitRepos/ThirdParty/crashpad> gn gen out/default

ERROR at //build/crashpad_buildconfig.gni:56:5: Unable to load "D:/Work/GitRepos/ThirdParty/crashpad/third_party/mini_chromium/mini_chromium/build/compiler.gni".
    import("../third_party/mini_chromium/mini_chromium/build/compiler.gni")
    ^--------------------------------------------------------------------- 
See //BUILD.gn:15:1: whence it was imported. 
import("build/crashpad_buildconfig.gni") 
^--------------------------------------

Which is correct. There are no sub-folders under: D:\Work\GitRepos\ThirdParty\crashpad\third_party\mini_chromium

There must be something missing from the configuration instructions(?) How does one build crashpad for windows?