gistfile1.txt

angular
	.module('...', [...])
	...
	.controller('SomeController', ['$scope', '$location', LoggedInUser])
  	.factory('Util', Util);
  
function Util($scope, $location, LoggedInUser) {
	console.log('logout');
	return {
		logout: function() {
			LoggedInUser.setEmail('');
			console.log('LoggedInUser.getEmail()='+LoggedInUser.getEmail());
			$location.path('#home');
		}
	};
};

function SomeController($scope, $location, LoggedInUser) {
	  ...
	  Util.logout($scope, $location, LoggedInUser);
};