GitLab

This is not really part of the JSON standard but a common practice and is
harmless in most of the cases so we can enable it for JSON policy files.

BUG=101141
TEST=none


Review URL: http://codereview.chromium.org/8423079

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110503 0039d316-1c4b-4281-b951-d872f2087c98