code: function (state, title, url) {
  		var win = this.win;
  		if (this.canClientNavigate()) {
  			win.history.replaceState(state, title, url);
  		} else if (url !== this.currentUrl()) {
  
  			// On browsers that don't support history navigation, only want to
  			// replace state if the URL is actually changing.  Otherwise we're
  			// in for a potential infinite refresh loop.
  			this.navigationWindow().location.replace(url);
  		}
  	}
docs: Same as HTML5 replaceState API, but with old browser support
  @method replaceState
  @param {Object} state The state object
  @param {String} title The title string
  @param {String} url The new url