angular/angular.js — pull request #5507 by cburgdorf (2013-12-21 20:12:14+00:00)
Title: feat($rootScope): adds $onRootScope method

This adds an $onRootScope method to the
scope type. This allows developers to use
$rootScope.$emit + $scope.$onRootScope as
a fast eventBus which doesn't use scope
bubbleing.

Fixes #4574, Relates to #5371