BUG=11287
TEST=gcl commit should fail unless BUG= & TEST= exist in change list description or --no_presubmit is used.

Review URL: http://codereview.chromium.org/113294

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@15905 0039d316-1c4b-4281-b951-d872f2087c98