Remove unnecessary rooting from `CSSStyleDeclaration`
Remove unnecessary rooting from `CSSStyleDeclaration`

This commit will replace calls to `self.owner.root()` with `self.owner`
to avoid unnecessary rooting of JS elements objects.

Ref.- Issue: #8126

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