That recipe no longer exists, as of
https://chromium.googlesource.com/chromium/tools/depot_tools/+/e0cc9e494929d2fd821a3542096f533001e7d67d

Referring to it in the tutorial is misleading. It seems that the docs scripts
haven't been run in awhile, so there are some unrelated changes as well.

Review-Url: https://codereview.chromium.org/2162223003