This was breaking presubmit because the linked gae_ts_mon subdir was absent.

R=andybons@chromium.org, dsansome@chromium.org, dnj@chromium.org
BUG=608490

Review-Url: https://codereview.chromium.org/1959193002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@300511 0039d316-1c4b-4281-b951-d872f2087c98