It was added in r80045 but was overwriten in r82495 when I synced upload.py to
r705 since upstreaming that part staled.

TBR=dpranke
TEST="git mv foo bar; git commit -a; git cl upload" shows 2 files, one A+, one D.
BUG=none

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@84264 0039d316-1c4b-4281-b951-d872f2087c98