Better test for existence of parent browsing context (used for acid test, was causing issues testing in IE7)
Better test for existence of parent browsing context (used for acid test, was causing issues testing in IE7)

jonathan-fielding/polyfill-service,jonathan-fielding/polyfill-service,kdzwinel/polyfill-service,mcshaz/polyfill-service,jonathan-fielding/polyfill-service,JakeChampion/polyfill-service,JakeChampion/polyfill-service,mcshaz/polyfill-service,mcshaz/polyfill-service,kdzwinel/polyfill-service,kdzwinel/polyfill-service