[1.0] Tap gesture does not trigger when calling `this.click` in IE10

[cdata]

Considering the following contrived element and usage:

var XTapable = Polymer({
  is: 'x-tapable`

  listeners: {
    tap: '_onTap'
  },

  _onTap: function() {
    console.log('Tapped');
  }
});

var tapable = new XTapable();

tapable.click();

"Tapped" is not logged to the console in IE10.

Here is a live JSBin example.

[cdata]

/cc @azakus