Auto merge of #10898 - asajeffrey:chaotic-even-better, r=Manishearth
Auto merge of #10898 - asajeffrey:chaotic-even-better, r=Manishearth

In chaos-monkey mode, only keep the mozbrowser pipeline alive.

Fixes #10897

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