This is relevent for when the only "git" in your PATH is git.bat (from
depot_tools). I'd guess this is pretty common for Googlers.

Bug: v8:5960
Change-Id: I35bc49c6054afed20481ed408cfd02b7a4c346c8
Reviewed-on: https://chromium-review.googlesource.com/1019340
Commit-Queue: agrieve <agrieve@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52698}