WebSocket layout test cleanup

- Rename "Web Socket" in layout tests
- Rephrase comments
- Make comments fit 80 col
- Fix comment referring old spec hixie-60

BUG=none

Review URL: https://codereview.chromium.org/52103004

git-svn-id: svn://svn.chromium.org/blink/trunk@160931 bbb929c8-8fbe-4397-9dbb-9b2b20218538