Guard inheriting font-size with what we actually need.
Guard inheriting font-size with what we actually need.

MozReview-Commit-ID: C4QaV5cNLh5
Signed-off-by: Emilio Cobos Álvarez <86fa523305b8ad6a8a853c04cfef24a0445908d3@crisal.io>

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