updated; show the real last-change revision and not the current HEAD revision.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/6881049

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@82124 0039d316-1c4b-4281-b951-d872f2087c98