Fixed scheduler setTimeout fallback#14358

Merged

bvaughn merged 3 commits intofacebook:masterfrom bvaughn:scheduler-setTimeout-fix

Dec 1, 2018

Commits on Nov 29, 2018

Fixed scheduler setTimeout fallback
Brian Vaughn
committed

Commits on Nov 30, 2018

Combined window and global check for _schedMock
Brian Vaughn
committed

Commits on Dec 1, 2018

Made Jest scheduler package private
Brian Vaughn
committed