raqPolyfill.js

(function(window) {

	var _lastTime = 0;

	window.requestAnimationFrame =
		window.requestAnimationFrame ||
		function(callback) {
			var currTime = new Date().getTime();
			var timeToCall = Math.max(0, 16 - (currTime - _lastTime));
			var id = window.setTimeout(function() {
				callback(currTime + timeToCall);
			}, timeToCall);
			_lastTime = currTime + timeToCall;
			return id;
		};

	window.cancelAnimationFrame =
		window.cancelAnimationFrame ||
		function(id) {
			clearTimeout(id);
		};

	window.performance = performance || {};
	window.performance.now = window.performance.now || function() { return new Date().getTime(); };

}(window));

If throttling is needed:
https://twitter.com/arxpoetica/status/224355470444474368
http://stackoverflow.com/questions/19000109/javascript-cant-adjust-framerate-requestanimationframe
http://stackoverflow.com/questions/19764018/controlling-fps-with-requestanimationframe