Fix incorrect </code> tags.

BUG=293756
NOTRY=true

Review URL: https://codereview.chromium.org/131523005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246130 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246130