This is needed for making PostUploadHooks that don't have to re-invent
the git footers library.
Bug:
Change-Id: I0a0ccf3dffd25152c2c273487ddbd9b279d80678
Reviewed-on: https://chromium-review.googlesource.com/461729
Reviewed-by: Aaron Gable <agable@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>