Fixes a wrong test for HTMLContentElement
Fixes a wrong test for HTMLContentElement

callumlocke/webcomponentsjs,kittens/webcomponentsjs,uniqname/webcomponentsjs,uniqname/webcomponentsjs,threeday0905/webcomponentsjs,Kureev/webcomponentsjs,AceMood/webcomponentsjs,chiefcll/webcomponentsjs,callumlocke/webcomponentsjs,bjlxj2008/webcomponentsjs,tanzhihang/webcomponentsjs,azogheb/webcomponentsjs,philipwalton/webcomponentsjs,Kureev/webcomponentsjs,threeday0905/webcomponentsjs,azogheb/webcomponentsjs,tachyon1337/webcomponentsjs,yyx990803/webcomponentsjs,sebmck/webcomponentsjs,philipwalton/webcomponentsjs,yyx990803/webcomponentsjs,kittens/webcomponentsjs,webcomponents/polyfills,AceMood/webcomponentsjs,uniqname/webcomponentsjs,webcomponents/polyfills,AceMood/webcomponentsjs,chiefcll/webcomponentsjs,tanzhihang/webcomponentsjs,callumlocke/webcomponentsjs,jre-g/webcomponentsjs,nirdeshdwa/webcomponentsjs,azogheb/webcomponentsjs,tuespetre/webcomponentsjs,tanzhihang/webcomponentsjs,tachyon1337/webcomponentsjs,threeday0905/webcomponentsjs,sebmck/webcomponentsjs,jre-g/webcomponentsjs,cpboyd/webcomponentsjs,tuespetre/webcomponentsjs,jre-g/webcomponentsjs,Kureev/webcomponentsjs,nirdeshdwa/webcomponentsjs,kittens/webcomponentsjs,philipwalton/webcomponentsjs,cpboyd/webcomponentsjs,tachyon1337/webcomponentsjs,bjlxj2008/webcomponentsjs,chiefcll/webcomponentsjs,tuespetre/webcomponentsjs,bjlxj2008/webcomponentsjs,yyx990803/webcomponentsjs,sebmck/webcomponentsjs,nirdeshdwa/webcomponentsjs,webcomponents/polyfills,cpboyd/webcomponentsjs