RequestAnimationFrame not passing timestamp in IE

[DartBot]

This issue was originally filed by [email protected]

---

dart2js:

When the browser (like IE) does not support window.requestAnimationFrame, window.setTimeout() is used, to simulate the same result:

this.requestAnimationFrame = function(callback) {
       return window.setTimeout(callback, 16 /* 16ms ~= 60fps */);
   };

But this will not pass the timestamp.

However the dart api states that the callback passes an integer with the timestamp:
typedef bool RequestAnimationFrameCallback(int time);

This will result in a crash when you start doing things like "b = time - a" because time is undefined.

It's easy to find a workaround but a better solution would be to make sure the parameter time != null.

[sethladd]

Added Area-HTML, Triaged labels.

[vsmenon]

Added Duplicate label.
Marked as being merged into #3016.