Fix eliding, truncation issues with hostnames in security information dialog for windows, linux platforms resp.

      BUG=48597
TEST=None

Review URL: http://codereview.chromium.org/2958002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@51972 0039d316-1c4b-4281-b951-d872f2087c98