EngineStateReducer

Element	Missed Instructions	Cov.	Missed Branches	Cov.	Missed	Cxty	Missed	Lines	Missed	Methods
Total	60 of 264	77%	18 of 52	65%	18	27	8	43	0	1
reduce(BrowserState, EngineAction)		77%		65%	18	27	8	43	0	1