They're needed by infra recipes (https://codereview.chromium.org/2045493002).

BUG=617565

Review-Url: https://codereview.chromium.org/2045473002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@300695 0039d316-1c4b-4281-b951-d872f2087c98