This is a redo of http://codereview.chromium.org/123020 (revision 18198) that was reverted in revision 18232 because of a codereview.settings misconfiguration and not because the script was broken.

The misconfiguration was fixed in http://codereview.chromium.org/126021

Review URL: http://codereview.chromium.org/125135

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@18612 0039d316-1c4b-4281-b951-d872f2087c98