auto merge of #1080 : Ms2ger/servo/get_jsobject-cast, r=jdm
auto merge of #1080 : Ms2ger/servo/get_jsobject-cast, r=jdm



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s/servo,codemac/servo,dhananjay92/servo,mbrubeck/servo,DominoTree/servo,saneyuki/servo,zentner-kyle/servo,juzer10/servo,nnethercote/servo,bjwbell/servo,jimberlage/servo,avadacatavra/servo,larsbergstrom/servo,notriddle/servo,nerith/servo,mukilan/servo,srbhklkrn/SERVOENGINE,fiji-flo/servo,rnestler/servo,ConnorGBrewster/servo,huonw/servo,DominoTree/servo,tafia/servo,huonw/servo,thiagopnts/servo,mrobinson/servo,saneyuki/servo,DominoTree/servo,dvberkel/servo,saneyuki/servo,szeged/servo,DominoTree/servo,g-k/servo,splav/servo,A-deLuna/servo,upsuper/servo,saneyuki/servo,rnestler/servo,luniv/servo,emilio/servo,jgraham/servo,dhananjay92/servo,peterjoel/servo,boghison/servo,saratang/servo,pyecs/servo,jimberlage/servo,larsbergstrom/servo,RenaudParis/servo,nnethercote/servo,canaltinova/servo,codemac/servo,mbrubeck/servo,aidanhs/servo,wpgallih/servo,ryancanhelpyou/servo,upsuper/servo,upsuper/servo,s142857/servo,jlegendary/servo,DominoTree/servo,CJ8664/servo,codemac/servo,pyfisch/servo,pyecs/servo,echochamber/servo,canaltinova/servo,codemac/servo,brendandahl/servo,metajack/servo,chotchki/servo,froydnj/servo,steveklabnik/servo,snf/servo,rnestler/servo,shrenikgala/servo,dsandeephegde/servo,szeged/servo,ruud-v-a/servo,steveklabnik/servo,youprofit/servo,aidanhs/servo,paulrouget/servo,mdibaiee/servo,jlegendary/servo,notriddle/servo,rnestler/servo,jimberlage/servo,splav/servo,nerith/servo,caldwell/servo,froydnj/servo,nerith/servo,Adenilson/prototype-viewing-distance,tempbottle/servo,froydnj/servo,dagnir/servo,larsbergstrom/servo,zentner-kyle/servo,CJ8664/servo,dvberkel/servo,saratang/servo,aidanhs/servo,RenaudParis/servo,akosel/servo,larsbergstrom/servo,A-deLuna/servo,shrenikgala/servo,pyfisch/servo,dsandeephegde/servo,canaltinova/servo,metajack/servo,anthgur/servo,Shraddha512/servo,szeged/servo,fiji-flo/servo,eddyb/servo,Aalhad/CanvasRenderingContext2DMozilla,zhangjunlei26/servo,hyowon/servo,ruud-v-a/servo,vks/servo,tafia/servo,AnthonyBroadCrawford/servo,eddyb/servo,hyowon/servo,zentner-kyle/servo,rnestler/servo,mbrubeck/servo,sadmansk/servo,bfrohs/servo,zhangjunlei26/servo,zentner-kyle/servo,owaspjocur/servo,meh/servo,shrenikgala/servo,pgonda/servo,vks/servo,jimberlage/servo,dmarcos/servo,avadacatavra/servo,aweinstock314/servo,bfrohs/servo,dhananjay92/servo,tempbottle/servo,anthgur/servo,akosel/servo,g-k/servo,bfrohs/servo,zhangjunlei26/servo,WriterOfAlicrow/servo,jgraham/servo,michaelwu/servo,srbhklkrn/SERVOENGINE,evilpie/servo,chotchki/servo,CJ8664/servo,akosel/servo,RenaudParis/servo,evilpie/servo,Aalhad/CanvasRenderingContext2DMozilla,avadacatavra/servo,szeged/servo,fiji-flo/servo,seanmonstar/servo,caldwell/servo,GreenRecycleBin/servo,dmarcos/servo,peterjoel/servo,dhananjay92/servo,jimberlage/servo