Project import generated by Copybara.
GitOrigin-RevId: 63746295f1a5ab5a619056791995793d65529e62
diff --git a/node_modules/material-design-lite/src/third_party/rAF.js b/node_modules/material-design-lite/src/third_party/rAF.js
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+// Source: https://github.com/darius/requestAnimationFrame/blob/master/requestAnimationFrame.js
+// Adapted from https://gist.github.com/paulirish/1579671 which derived from
+// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
+// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating
+
+// requestAnimationFrame polyfill by Erik Möller.
+// Fixes from Paul Irish, Tino Zijdel, Andrew Mao, Klemen Slavič, Darius Bacon
+
+// MIT license
+
+(function() {
+ 'use strict';
+
+ if (!Date.now) {
+ /**
+ * Date.now polyfill.
+ * @return {number} the current Date
+ */
+ Date.now = function() { return new Date().getTime(); };
+ Date['now'] = Date.now;
+ }
+
+ var vendors = ['webkit', 'moz'];
+ for (var i = 0; i < vendors.length && !window.requestAnimationFrame; ++i) {
+ var vp = vendors[i];
+ window.requestAnimationFrame = window[vp + 'RequestAnimationFrame'];
+ window.cancelAnimationFrame = (window[vp + 'CancelAnimationFrame'] ||
+ window[vp + 'CancelRequestAnimationFrame']);
+ window['requestAnimationFrame'] = window.requestAnimationFrame;
+ window['cancelAnimationFrame'] = window.cancelAnimationFrame;
+ }
+
+ if (/iP(ad|hone|od).*OS 6/.test(window.navigator.userAgent) || !window.requestAnimationFrame || !window.cancelAnimationFrame) {
+ var lastTime = 0;
+ /**
+ * requestAnimationFrame polyfill.
+ * @param {!Function} callback the callback function.
+ */
+ window.requestAnimationFrame = function(callback) {
+ var now = Date.now();
+ var nextTime = Math.max(lastTime + 16, now);
+ return setTimeout(function() { callback(lastTime = nextTime); },
+ nextTime - now);
+ };
+ window.cancelAnimationFrame = clearTimeout;
+ window['requestAnimationFrame'] = window.requestAnimationFrame;
+ window['cancelAnimationFrame'] = window.cancelAnimationFrame;
+ }
+
+})();