{
  "firefox": "28",
  "chrome": "22",
  "safari": "7.1"
}

{
  "firefox": "28",
  "chrome": "23",
  "safari": "7.1"
}

Drop support for Chrome 22
Drop support for Chrome 22

Chrome 22 uses an older version of Webkit that takes a strict and
ultimately nonstandard interpretation of percentage heights. Incredibly,
Chrome 23 works fine.

Confirmed that Safari 7.1 does not have an offending Webkit
implementation.
