The error event on `<source>` elements doesn't work. Looking at #4370, it seems like there is an `onError` for `<video>` but I can't tell if that's supposed to work for `<source>` too.

The error event is useful so I can deduce which format the browser is using.

case 'button':
        lastProps = ReactDOMButton.getHostProps(this, lastProps);
        nextProps = ReactDOMButton.getHostProps(this, nextProps);
        break;
      case 'input':
        ReactDOMInput.updateWrapper(this);
        lastProps = ReactDOMInput.getHostProps(this, lastProps);
        nextProps = ReactDOMInput.getHostProps(this, nextProps);
        break;
      case 'option':
        lastProps = ReactDOMOption.getHostProps(this, lastProps);
        nextProps = ReactDOMOption.getHostProps(this, nextProps);
        break;
      case 'select':
        lastProps = ReactDOMSelect.getHostProps(this, lastProps);
        nextProps = ReactDOMSelect.getHostProps(this, nextProps);
        break;
      case 'textarea':
        ReactDOMTextarea.updateWrapper(this);
        lastProps = ReactDOMTextarea.getHostProps(this, lastProps);
        nextProps = ReactDOMTextarea.getHostProps(this, nextProps);
        break;
    }
    assertValidProps(this, nextProps);
    this._updateDOMProperties(lastProps, nextProps, transaction);
    this._updateDOMChildren(
      lastProps,
      nextProps,
      transaction,
      context