This is needed to run the presubmit commit checks.
Tested this CL by running git cl presubmit locally.

BUG=420910

Review URL: https://codereview.chromium.org/1156923006

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@295472 0039d316-1c4b-4281-b951-d872f2087c98