Simplify ThreadSafeLayoutNodeChildrenIterator::next().
Simplify ThreadSafeLayoutNodeChildrenIterator::next().

notriddle/servo,jdramani/servo,CJ8664/servo,mbrubeck/servo,jdramani/servo,boghison/servo,szeged/servo,nrc/servo,cbrewster/servo,emilio/servo,peterjoel/servo,brendandahl/servo,g-k/servo,codemac/servo,nnethercote/servo,emilio/servo,aweinstock314/servo,DominoTree/servo,steveklabnik/servo,kindersung/servo,huonw/servo,dhananjay92/servo,akosel/servo,wartman4404/servo,dsandeephegde/servo,akosel/servo,thiagopnts/servo,g-k/servo,jlegendary/servo,pyfisch/servo,zentner-kyle/servo,notriddle/servo,AnthonyBroadCrawford/servo,aidanhs/servo,zentner-kyle/servo,canaltinova/servo,CJ8664/servo,brendandahl/servo,upsuper/servo,eddyb/servo,walac/servo,peterjoel/servo,fiji-flo/servo,tafia/servo,thiagopnts/servo,szeged/servo,peterjoel/servo,DominoTree/servo,dvberkel/servo,upsuper/servo,s142857/servo,CJ8664/servo,brendandahl/servo,nrc/servo,jlegendary/servo,eddyb/servo,nick-thompson/servo,ConnorGBrewster/servo,huonw/servo,thiagopnts/servo,zentner-kyle/servo,pyecs/servo,kindersung/servo,sadmansk/servo,walac/servo,nick-thompson/servo,ConnorGBrewster/servo,steveklabnik/servo,saneyuki/servo,rentongzhang/servo,CJ8664/servo,CJ8664/servo,emilio/servo,steveklabnik/servo,dagnir/servo,kindersung/servo,dagnir/servo,vks/servo,DominoTree/servo,peterjoel/servo,dagnir/servo,RenaudParis/servo,caldwell/servo,huonw/servo,anthgur/servo,sadmansk/servo,mbrubeck/servo,szeged/servo,dhananjay92/servo,pyfisch/servo,KiChjang/servo,canaltinova/servo,A-deLuna/servo,runarberg/servo,canaltinova/servo,mattnenterprise/servo,mattnenterprise/servo,eddyb/servo,mbrubeck/servo,cbrewster/servo,mattnenterprise/servo,pyecs/servo,AnthonyBroadCrawford/servo,youprofit/servo,nnethercote/servo,jdramani/servo,j3parker/servo,DominoTree/servo,nrc/servo,jdramani/servo,j3parker/servo,GyrosOfWar/servo,s142857/servo,rnestler/servo,szeged/servo,dagnir/servo,SimonSapin/servo,meh/servo,WriterOfAlicrow/servo,runarberg/servo,splav/servo,A-deLuna/servo,pyfisch/servo,CJ8664/servo,thiagopnts/servo,walac/servo,nnethercote/servo,jlegendary/servo,dati91/servo,anthgur/servo,sadmansk/servo,aweinstock314/servo,GyrosOfWar/servo,nerith/servo,KiChjang/servo,dsandeephegde/servo,rnestler/servo,runarberg/servo,splav/servo,saratang/servo,saneyuki/servo,codemac/servo,jimberlage/servo,huonw/servo,larsbergstrom/servo,saratang/servo,splav/servo,akosel/servo,notriddle/servo,AnthonyBroadCrawford/servo,anthgur/servo,saneyuki/servo,pyecs/servo,kindersung/servo,dhananjay92/servo,dsandeephegde/servo,canaltinova/servo,CJ8664/servo,szeged/servo,nick-thompson/servo,RenaudParis/servo,peterjoel/servo,larsbergstrom/servo,eddyb/servo,DominoTree/servo,wartman4404/servo,GyrosOfWar/servo,ConnorGBrewster/servo,notriddle/servo,caldwell/servo,runarberg/servo,g-k/servo,boghison/servo,paulrouget/servo,caldwell/servo,avadacatavra/servo,WriterOfAlicrow/servo,dhananjay92/servo,kindersung/servo,nnethercote/servo,thiagopnts/servo,KiChjang/servo,mdibaiee/servo,splav/servo,jdramani/servo,dati91/servo,bjwbell/servo,ConnorGBrewster/servo,j3parker/servo,paulrouget/servo,emilio/servo,KiChjang/servo,zentner-kyle/servo,A-deLuna/servo,dsandeephegde/servo,upsuper/servo,dati91/servo,avadacatavra/servo,WriterOfAlicrow/servo,steveklabnik/servo,szeged/servo,upsuper/servo,bjwbell/servo,wartman4404/servo,peterjoel/servo,peterjoel/servo,szeged/servo,s142857/servo,runarberg/servo,saneyuki/servo,vks/servo,akosel/servo,tafia/servo,codemac/servo,rnestler/servo,paulrouget/servo,upsuper/servo,nrc/servo,fiji-flo/servo,nnethercote/servo,canaltinova/servo,youprofit/servo,vks/servo,mdibaiee/servo,rnestler/servo,nerith/servo,GyrosOfWar/servo,saratang/servo,tafia/servo,aidanhs/servo,peterjoel/servo,mbrubeck/servo,emilio/servo,steveklabnik/servo,boghison/servo,upsuper/servo,pyfisch/servo,avadacatavra/servo,youprofit/servo,avadacatavra/servo,KiChjang/servo,szeged/servo,jimberlage/servo,saratang/servo,jimberlage/servo,huonw/servo,jlegendary/servo,wartman4404/servo,boghison/servo,wartman4404/servo,pyecs/servo,saneyuki/servo,dvberkel/servo,ConnorGBrewster/servo,larsbergstrom/servo,j3parker/servo,walac/servo,DominoTree/servo,A-deLuna/servo,rnestler/servo,rentongzhang/servo,wartman4404/servo,mattnenterprise/servo,larsbergstrom/servo,vks/servo,SimonSapin/servo,WriterOfAlicrow/servo,j3parker/servo,nrc/servo,splav/servo,RenaudParis/servo,brendandahl/servo,dsandeephegde/servo,dhananjay92/servo,tempbottle/servo,kindersung/servo,larsbergstrom/servo,caldwell/servo,pyfisch/servo,dhananjay92/servo,sadmansk/servo,cbrewster/servo,rentongzhang/servo,larsbergstrom/servo,meh/servo,dsandeephegde/servo,brendandahl/servo,nick-thompson/servo,emilio/servo,s142857/servo,bjwbell/servo,rentongzhang/servo,AnthonyBroadCrawford/servo,nick-thompson/servo,anthgur/servo,larsbergstrom/servo,eddyb/servo,pyfisch/servo,splav/servo,mbrubeck/servo,pyfisch/servo,splav/servo,akosel/servo,SimonSapin/servo,akosel/servo,nerith/servo,aweinstock314/servo,notriddle/servo,bjwbell/servo,sadmansk/servo,notriddle/servo,thiagopnts/servo,WriterOfAlicrow/servo,splav/servo,paulrouget/servo,DominoTree/servo,dsandeephegde/servo,meh/servo,aweinstock314/servo,mbrubeck/servo,szeged/servo,nnethercote/servo,akosel/servo,splav/servo,anthgur/servo,fiji-flo/servo,nnethercote/servo,nerith/servo,zentner-kyle/servo,rnestler/servo,dhananjay92/servo,thiagopnts/servo,SimonSapin/servo,tafia/servo,GyrosOfWar/servo,runarberg/servo,emilio/servo,aidanhs/servo,saratang/servo,fiji-flo/servo,eddyb/servo,paulrouget/servo,kindersung/servo,KiChjang/servo,nerith/servo,mdibaiee/servo,pyecs/servo,pyfisch/servo,avadacatavra/servo,vks/servo,RenaudParis/servo,dvberkel/servo,aidanhs/servo,SimonSapin/servo,thiagopnts/servo,tempbottle/servo,saratang/servo,youprofit/servo,boghison/servo,KiChjang/servo,wartman4404/servo,boghison/servo,steveklabnik/servo,fiji-flo/servo,saneyuki/servo,fiji-flo/servo,meh/servo,notriddle/servo,DominoTree/servo,codemac/servo,rentongzhang/servo,dati91/servo,jdramani/servo,tempbottle/servo,dsandeephegde/servo,j3parker/servo,emilio/servo,tempbottle/servo,caldwell/servo,szeged/servo,boghison/servo,tafia/servo,dati91/servo,ConnorGBrewster/servo,jlegendary/servo,larsbergstrom/servo,nerith/servo,vks/servo,brendandahl/servo,huonw/servo,SimonSapin/servo,jimberlage/servo,A-deLuna/servo,WriterOfAlicrow/servo,aidanhs/servo,walac/servo,g-k/servo,mdibaiee/servo,KiChjang/servo,jlegendary/servo,cbrewster/servo,tempbottle/servo,upsuper/servo,youprofit/servo,g-k/servo,aidanhs/servo,notriddle/servo,peterjoel/servo,nick-thompson/servo,emilio/servo,peterjoel/servo,sadmansk/servo,canaltinova/servo,saneyuki/servo,meh/servo,steveklabnik/servo,SimonSapin/servo,AnthonyBroadCrawford/servo,codemac/servo,tafia/servo,SimonSapin/servo,DominoTree/servo,eddyb/servo,mdibaiee/servo,paulrouget/servo,s142857/servo,zentner-kyle/servo,vks/servo,mdibaiee/servo,cbrewster/servo,avadacatavra/servo,jimberlage/servo,codemac/servo,nrc/servo,DominoTree/servo,dati91/servo,pyecs/servo,paulrouget/servo,mattnenterprise/servo,brendandahl/servo,rnestler/servo,youprofit/servo,larsbergstrom/servo,WriterOfAlicrow/servo,CJ8664/servo,jimberlage/servo,paulrouget/servo,mbrubeck/servo,nnethercote/servo,tempbottle/servo,jimberlage/servo,ConnorGBrewster/servo,paulrouget/servo,RenaudParis/servo,codemac/servo,s142857/servo,pyecs/servo,fiji-flo/servo,upsuper/servo,GyrosOfWar/servo,sadmansk/servo,jdramani/servo,meh/servo,bjwbell/servo,cbrewster/servo,dagnir/servo,saneyuki/servo,saneyuki/servo,splav/servo,canaltinova/servo,A-deLuna/servo,rentongzhang/servo,rnestler/servo,tafia/servo,KiChjang/servo,dvberkel/servo,g-k/servo,aweinstock314/servo,runarberg/servo,dvberkel/servo,huonw/servo,pyfisch/servo,g-k/servo,aidanhs/servo,avadacatavra/servo,notriddle/servo,bjwbell/servo,j3parker/servo,meh/servo,RenaudParis/servo,cbrewster/servo,AnthonyBroadCrawford/servo,RenaudParis/servo,dagnir/servo,nick-thompson/servo,emilio/servo,nnethercote/servo,nnethercote/servo,walac/servo,dagnir/servo,nrc/servo,tempbottle/servo,eddyb/servo,zentner-kyle/servo,ConnorGBrewster/servo,fiji-flo/servo,rentongzhang/servo,A-deLuna/servo,sadmansk/servo,dvberkel/servo,walac/servo,pyfisch/servo,mbrubeck/servo,larsbergstrom/servo,dati91/servo,jlegendary/servo,caldwell/servo,dati91/servo,bjwbell/servo,anthgur/servo,anthgur/servo,notriddle/servo,mattnenterprise/servo,caldwell/servo,mdibaiee/servo,saratang/servo,anthgur/servo,canaltinova/servo,GyrosOfWar/servo,s142857/servo,mattnenterprise/servo,cbrewster/servo,mattnenterprise/servo,KiChjang/servo,jimberlage/servo,avadacatavra/servo,nerith/servo,saneyuki/servo,dvberkel/servo,AnthonyBroadCrawford/servo,aweinstock314/servo,aweinstock314/servo,jimberlage/servo,youprofit/servo,paulrouget/servo