Function createAndAddChildDirectoryWatcher

test/fixtures/snapshot/typescript.js:6699–6702

* Create new childDirectoryWatcher and add it to the new ChildDirectoryWatcher list

(childName)

             * Create new childDirectoryWatcher and add it to the new ChildDirectoryWatcher list
             */
            function createAndAddChildDirectoryWatcher(childName) {
                var result = createDirectoryWatcher(childName, options);
                addChildDirectoryWatcher(result);
            }
            /**
             * Add child directory watcher to the new ChildDirectoryWatcher list
             */