Adjusting to @keyframes grammar
Please see http://dev.w3.org/csswg/css-animations/#keyframes and https://developer.mozilla.org/en-US/docs/Web/CSS/@keyframes
Merge commit 'd41ee60231f3f101e22bed4a7b924bc26bcdee83'

* commit 'd41ee60231f3f101e22bed4a7b924bc26bcdee83':
  Adjusting to @keyframes grammar Please see http://dev.w3.org/csswg/css-animations/#keyframes and https://developer.mozilla.org/en-US/docs/Web/CSS/@keyframes