UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36

Steps to reproduce the problem:
See the following fiddle: https://jsfiddle.net/s1qa6v98/7/

Attaching event handlers to SVG animation events ("start", "repeat", "end") does not work in Chrome.  Chrome requires that you use the "onX" properties.
However other events, like "click", can be attached that way.

Firefox is the opposite.  It doesn't support the "onX" properties, and instead requires that you use `addEventListener".

if ("onrepeat" in anim) {

  // Required for Chrome
  anim.onrepeat = function(evt) {
    console.log("onrepeat");
  };

} else {

  // Required for Firefox
  anim.addEventListener("repeat", function(evt) {
    console.log("repeat");
  });

}

What is the expected behavior?
That addEventListener("start"/"repeat"/"end", fn) works.

What went wrong?
addEventListener("start"/"repeat"/"end", fn) doesn't work.

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 68.0.3440.106  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: