UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.82 Safari/537.36

Steps to reproduce the problem:
1. Open the Dev Tools Console.
2. Run the following script which logs each KeyDown Event after you press and hold Meta (command) and Shift. I recommend clicking the "preserve log".

document.addEventListener('keydown', function(event) {
    event.preventDefault(); 

    //if Command is pressed, and Shift is pressed, and the triggered event is NOT the Command or Shift key
    if (event.metaKey && event.shiftKey && [16,91].indexOf(event.keyCode) === -1)
        console.log(event); //log the event

});

3. Press Command+Shift+E

What is the expected behavior?
The key combination should produce an Event, and in the case of the script above, it should log it in the console.

What went wrong?
It doesn't seem to produce an Event.

Did this work before? N/A 

Chrome version: 52.0.2743.82  Channel: stable
OS Version: OS X 10.11.6
Flash Version: Shockwave Flash 22.0 r0

If you use the script and press any other combination, it will produce and Event.  Command+Shift+R, Command+Shift+A, Command+Shift+(any key).