Make the try job presubmit check (CheckTryJobExecution) less verbose.

Also clean up the Tree is closed presubmit check (CheckTreeIsOpen).

TEST=none
BUG=none
Review URL: http://codereview.chromium.org/165251

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@23195 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed