Polish the about:conflicts page.

Address review comments from Nico and add a separating line as
requested by Glen.

BUG=51105
TEST=None

Review URL: http://codereview.chromium.org/5640001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@68346 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed