Remove duplicate period in policy description.

BUG=none
TBR=ellyjones@chromium.org

Review URL: https://codereview.chromium.org/210953002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@259233 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed