Function tick

test/angular/1.7/angular.js:14257–14271

()

        }

        function tick() {
          if (skipApply) {
            $browser.defer(callback);
          } else {
            $rootScope.$evalAsync(callback);
          }
          deferred.notify(iteration++);

          if (count > 0 && iteration >= count) {
            deferred.resolve(iteration);
            clearIntervalFn(promise.$$intervalId);
          }

          if (!skipApply) $rootScope.$apply();
        }

        promise.$$intervalId = setIntervalFn(tick, delay, deferred, skipApply);