_WidgetBase.on does not accept dojo/touch

[ykami]

_WidgetBase.on does not accept dojo/touch. For example, in some widget code, 1. works, but 2. doesn't.

1. on(this.domNode, touch.press, lang.hitch(this, "onMouseDown"));
2. this.on(touch.press, lang.hitch(this, "onMouseDown"));

Script error occurs in _WidgetBase.js as below:

Uncaught TypeError: Object function (node, listener){//called by on(), see dojo.on
			return on(node, type, listener);
		} has no method 'toLowerCase' 

[bill]

In [29055]:

Allow _WidgetBase.on() and _Widget.on() to connect to synthetic events in addition to strings. Fixes #15559 !strict.

[ykami]

Verified it works as expected. Thanks.