BrowserStateReducer

Element	Missed Instructions	Cov.	Missed Branches	Cov.	Missed	Cxty	Missed	Lines	Missed	Methods
Total	26 of 321	91%	4 of 60	93%	4	31	1	32	0	1
reduce(BrowserState, BrowserAction)		91%		93%	4	31	1	32	0	1