To fix this flake:
https://uberchromegw.corp.google.com/i/internal.infra.try/builders/infra-internal-presubmit/builds/1216/steps/bot_update/logs/stdio

BUG=

Review URL: https://codereview.chromium.org/1417963005

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@297234 0039d316-1c4b-4281-b951-d872f2087c98