No functionality changes.

R=machenbach@chromium.org,andybons@chromium.org
BUG=579160,597638

Review URL: https://codereview.chromium.org/1877893002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@299844 0039d316-1c4b-4281-b951-d872f2087c98