This fixes CL:2880843 to use a module already present in vpython.

Bug: 1206782
Change-Id: If4158a62011e043e89f40f368c9c644434df6614
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2901758
Commit-Queue: Allen Webb <allenwebb@google.com>
Reviewed-by: Dirk Pranke <dpranke@google.com>