Auto merge of #12615 - nox:die-opts-die, r=Ms2ger
Auto merge of #12615 - nox:die-opts-die, r=Ms2ger

Remove use of opts::use_webrender in layout_thread

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DominoTree/servo,szeged/servo,szeged/servo,avadacatavra/servo,ConnorGBrewster/servo,KiChjang/servo,KiChjang/servo,fiji-flo/servo,saneyuki/servo,peterjoel/servo,szeged/servo,nnethercote/servo,larsbergstrom/servo,splav/servo,notriddle/servo,emilio/servo,paulrouget/servo,mattnenterprise/servo,KiChjang/servo,jimberlage/servo,szeged/servo,peterjoel/servo,emilio/servo,pyfisch/servo,peterjoel/servo,mbrubeck/servo,peterjoel/servo,fiji-flo/servo,cbrewster/servo,thiagopnts/servo,emilio/servo,DominoTree/servo,sadmansk/servo,emilio/servo,nnethercote/servo,nnethercote/servo,notriddle/servo,CJ8664/servo,mbrubeck/servo,dsandeephegde/servo,pyfisch/servo,emilio/servo,pyfisch/servo,upsuper/servo,splav/servo,nnethercote/servo,ConnorGBrewster/servo,ConnorGBrewster/servo,sadmansk/servo,sadmansk/servo,mattnenterprise/servo,dati91/servo,szeged/servo,CJ8664/servo,pyfisch/servo,upsuper/servo,anthgur/servo,KiChjang/servo,jimberlage/servo,notriddle/servo,thiagopnts/servo,notriddle/servo,SimonSapin/servo,emilio/servo,DominoTree/servo,mbrubeck/servo,rnestler/servo,SimonSapin/servo,mattnenterprise/servo,upsuper/servo,szeged/servo,upsuper/servo,paulrouget/servo,CJ8664/servo,saneyuki/servo,thiagopnts/servo,sadmansk/servo,thiagopnts/servo,saneyuki/servo,mbrubeck/servo,peterjoel/servo,SimonSapin/servo,dati91/servo,splav/servo,mbrubeck/servo,DominoTree/servo,nnethercote/servo,larsbergstrom/servo,rnestler/servo,fiji-flo/servo,splav/servo,KiChjang/servo,KiChjang/servo,peterjoel/servo,emilio/servo,dati91/servo,DominoTree/servo,anthgur/servo,szeged/servo,CJ8664/servo,SimonSapin/servo,peterjoel/servo,dsandeephegde/servo,eddyb/servo,fiji-flo/servo,CJ8664/servo,saneyuki/servo,notriddle/servo,anthgur/servo,mattnenterprise/servo,larsbergstrom/servo,splav/servo,upsuper/servo,mbrubeck/servo,avadacatavra/servo,canaltinova/servo,thiagopnts/servo,peterjoel/servo,mbrubeck/servo,DominoTree/servo,sadmansk/servo,eddyb/servo,anthgur/servo,rnestler/servo,jimberlage/servo,dsandeephegde/servo,szeged/servo,paulrouget/servo,rnestler/servo,dati91/servo,KiChjang/servo,CJ8664/servo,ConnorGBrewster/servo,szeged/servo,jimberlage/servo,pyfisch/servo,upsuper/servo,larsbergstrom/servo,dati91/servo,larsbergstrom/servo,DominoTree/servo,eddyb/servo,nnethercote/servo,splav/servo,avadacatavra/servo,sadmansk/servo,larsbergstrom/servo,nnethercote/servo,pyfisch/servo,canaltinova/servo,pyfisch/servo,canaltinova/servo,szeged/servo,avadacatavra/servo,pyfisch/servo,dati91/servo,paulrouget/servo,jimberlage/servo,avadacatavra/servo,saneyuki/servo,dati91/servo,larsbergstrom/servo,dsandeephegde/servo,paulrouget/servo,sadmansk/servo,splav/servo,fiji-flo/servo,KiChjang/servo,canaltinova/servo,rnestler/servo,eddyb/servo,pyfisch/servo,nnethercote/servo,peterjoel/servo,pyfisch/servo,ConnorGBrewster/servo,mbrubeck/servo,notriddle/servo,dsandeephegde/servo,nnethercote/servo,emilio/servo,cbrewster/servo,larsbergstrom/servo,thiagopnts/servo,ConnorGBrewster/servo,jimberlage/servo,rnestler/servo,canaltinova/servo,mattnenterprise/servo,dsandeephegde/servo,jimberlage/servo,ConnorGBrewster/servo,rnestler/servo,thiagopnts/servo,paulrouget/servo,paulrouget/servo,saneyuki/servo,splav/servo,dsandeephegde/servo,CJ8664/servo,canaltinova/servo,rnestler/servo,saneyuki/servo,sadmansk/servo,saneyuki/servo,anthgur/servo,larsbergstrom/servo,upsuper/servo,jimberlage/servo,canaltinova/servo,eddyb/servo,canaltinova/servo,upsuper/servo,anthgur/servo,SimonSapin/servo,eddyb/servo,SimonSapin/servo,CJ8664/servo,cbrewster/servo,fiji-flo/servo,notriddle/servo,ConnorGBrewster/servo,splav/servo,dsandeephegde/servo,saneyuki/servo,mattnenterprise/servo,larsbergstrom/servo,saneyuki/servo,paulrouget/servo,notriddle/servo,cbrewster/servo,DominoTree/servo,DominoTree/servo,cbrewster/servo,dati91/servo,SimonSapin/servo,eddyb/servo,fiji-flo/servo,thiagopnts/servo,splav/servo,anthgur/servo,paulrouget/servo,mattnenterprise/servo,avadacatavra/servo,KiChjang/servo,DominoTree/servo,notriddle/servo,avadacatavra/servo,peterjoel/servo,avadacatavra/servo,anthgur/servo,eddyb/servo,cbrewster/servo,emilio/servo,jimberlage/servo,mattnenterprise/servo,SimonSapin/servo,cbrewster/servo,fiji-flo/servo,emilio/servo,KiChjang/servo,paulrouget/servo,nnethercote/servo,notriddle/servo,cbrewster/servo