Otherwise the scripts make it looks like they are hung when the presubmit checks
are slow.

TEST=none
BUG=none

Review URL: http://codereview.chromium.org/3613007

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@61506 0039d316-1c4b-4281-b951-d872f2087c98