removeData doesn't properly remove the id on Chrome

[chikathreesix]

After updated to 4.11.4, I saw the error below many times.

Uncaught TypeError: Cannot read property 'handlers' of undefined

This is because getData returns null in vjs.on and prior to that, 'removeData' failed to delete the id with delete el[vjs.expando].

  try {
    delete el[vjs.expando];
  } catch(e) {
    if (el.removeAttribute) {
      el.removeAttribute(vjs.expando);
    } else {
      // IE doesn't appear to support removeAttribute on the document element
      el[vjs.expando] = null;
    }
  }

So far this happens only on Chrome(40.0.2214.111) and only when el is object element.
I tested delete syntax itself with object element on Chrome, but it actually failed to delete the property even though it returns true.

So I guess it should be Chrome's bug but I would suggest to make a change to getData to make sure it doesn't return null all the time.

[heff]

Good find, thanks! Interesting bug.