Fix typo in FRIEND_TEST presubmit nag.

BUG=NONE
TEST=NONE
TBR=maruel
Review URL: http://codereview.chromium.org/8687033

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111943 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed